PASS
| Check | Detail | |
|---|---|---|
| ✅ | Measures: behavior Check Unique ID: tool_arguments_contain | Tool 'web_fetch' called with matching arguments Checks: tool_name=web_fetch; url=mozilla.org; dimension=behavior |
| ✅ | Measures: capability Check Unique ID: tool_call_succeeded | web_fetch completed on call 1 Checks: tool_name=web_fetch; dimension=capability |
| ✅ | Measures: behavior Check Unique ID: llm_judge:rule:retrieve_current_public_evidence | web_fetch was called directly on the user-named URL https://www.mozilla.org/en-US/firefox/releases/ (E0002) and returned status 200 with the release index content (E0004). No model memory or substitute site was used as the basis for the answer; four follow-up fetches were all on mozilla.org release-note pages (E0005, E0008, E0011, E0014). Deterministic checks for mozilla.org arguments and fetch success are PASS. |
| ✅ | Measures: capability Check Unique ID: llm_judge:rule:obtain_relevant_current_evidence | Every fetch completed successfully (success:true, status_code 200) and returned subject-relevant content: the releases index enumerating 155.0.x, 153.x/153.x ESR and 140.x ESR lines (E0004); 155.0.1 notes dated September 4, 2026 with fixes and unresolved items (E0007); 155.0 notes dated September 1, 2026 with New/Fixed/Changed/Web Platform sections and the MFSA 2026-82 security link (E0010); 153.2.0 ESR dated September 1, 2026 with MFSA 2026-85 (E0013); and 140.15.0 ESR dated September 1, 2026 with MFSA 2026-84 (E0016). These dates fall inside the requested 14-day window relative to the 2026-09-11 execution date. |
| ✅ | Measures: outcome Check Unique ID: llm_judge:rule:answer_from_retrieved_evidence | The delivered answer (E0017, rendered in E0019–E0022) addresses both parts of the request. Current releases and dates match retrieved notes exactly: 155.0.1 = Sep 4, 2026 (E0007), 155.0 = Sep 1, 2026 (E0010), 153.2.0 ESR = Sep 1, 2026 (E0013), 140.15.0 ESR = Sep 1, 2026 (E0016); all four lie within the 14-day window ending 2026-09-11. Security claims are grounded: MFSA 2026-82 for 155.0 (E0010), MFSA 2026-85 for 153.2.0 and MFSA 2026-84 for 140.15.0, both described in their notes as security-fix-only rollups (E0013, E0016). Compatibility claims track the 155.0 'Changed'/'Web Platform'/'Unresolved' sections verbatim in substance: captive-portal domain change to firefox-portal-detection.com requiring allowlist updates, the 75-level CSS nesting cap making deeper rules unparseable, mailto: requiring explicit user action, ::-webkit-scrollbar narrowed to a site list, QUIC v2 support plus the UDP-blocked-network failure fixed in 155.0.1, the vertical-tabs sidebar persistence fix, and the still-unresolved washed-out macOS SDR video (E0010, E0007). The '153 is next' ESR-line characterization matches the 'Next Firefox 153.0esr' link on the 140.15.0 page (E0016). No calculation or method beyond the date window was requested, and the window is stated explicitly. No unsupported central claim was found. |
| ✅ | Measures: outcome Check Unique ID: llm_judge:rule:identify_sources | The answer attributes the information to Mozilla.org and includes inspectable links for each release (the four release-note URLs actually fetched in E0005, E0008, E0011, E0014) and for the three security advisories, whose URLs appear verbatim in the fetched release-note content (mfsa2026-82 in E0010, mfsa2026-85 in E0013, mfsa2026-84 in E0016). No URL in the answer is absent from retrieved evidence, so nothing was invented or guessed. |
| ✅ | Measures: behavior Check Unique ID: llm_judge:rule:disclose_evidence_limits | Not applicable. No triggering condition is observed: every fetch succeeded (E0004, E0007, E0010, E0013, E0016), no two sources disagreed, and the retrieved pages cover both halves of the request — current desktop and ESR releases and their release dates inside the 14-day window. The answer scopes its temporal claim to the four current releases it enumerated with retrieved dates rather than asserting an exhaustive audit of every version listed on the index, so no partial search was presented as exhaustive and no projection was stated as settled fact. |
| ✅ | llm_judge:terminal | Hark fetched the user-named Mozilla releases index, then fetched the four relevant release-note pages, and delivered a substantive final answer via send_message with final:true (E0017), listing current desktop and ESR releases, their dates within the past 14 days, security advisories, and compatibility changes. The requested read-only research output was produced with no blocker and no outstanding user input. |
| Tool | Calls | Durations (s) | Total (s) | Avg (s) |
|---|---|---|---|---|
| web_fetch | 5 | 0.096, 0.027, 0.043, 0.028, 0.038 | 0.2 | 0.046 |
{
"tool_name": "web_fetch",
"tool_input": {
"brief": "Current Firefox desktop and ESR releases",
"max_age_seconds": 3600,
"url": "https://www.mozilla.org/en-US/firefox/releases/"
},
"dispatch_id": "toolu_018Z2QphJSiXxrLWWT84aybK",
"parent_dispatch_id": "",
"handle": "",
"panel_kind": "web_fetch"
}{
"tool_name": "web_fetch",
"dispatch_id": "toolu_018Z2QphJSiXxrLWWT84aybK",
"status": "running",
"result": null,
"error": "",
"elapsed": null,
"fields": {
"progress": {
"message": "Current Firefox desktop and ESR releases",
"metadata": {
"browser_chain": false,
"url": "https://www.mozilla.org/en-US/firefox/releases/"
}
},
"status": "running",
"updatedAt": 1789168727441
}
}{
"tool_name": "web_fetch",
"dispatch_id": "toolu_018Z2QphJSiXxrLWWT84aybK",
"status": "completed",
"result": {
"content": "Firefox Release Notes — Firefox.com\n\n\n\n [](/en-US/)\n\n\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n Firefox for mobile\n\n\n\n  [Get Firefox on your phone](/en-US/mobile/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n Menu\n\n\n\n Menu\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n# Firefox Releases\n\n\n\nFirefox release notes are specific to each version of the application. Select your version from the list below to see the release notes for it.\n\n\n\n\n\n\n - ** [155.0.0](/firefox/155.0/releasenotes/)**\n\n\n - [155.0.1](/firefox/155.0.1/releasenotes/)\n\n\n\n\n - ** [154.0.0](/firefox/154.0/releasenotes/)**\n\n\n - [154.0.1](/firefox/154.0.1/releasenotes/)\n\n\n\n\n - ** [153.0.0](/firefox/153.0/releasenotes/)**\n\n\n - [153.0.1](/firefox/153.0.1/releasenotes/)\n - [153.0.3](/firefox/153.0.3/releasenotes/)\n - [153.0.4](/firefox/153.0.4/releasenotes/)\n\n\n - [153.0 ESR](/firefox/153.0esr/releasenotes/)\n - [153.1.0 ESR](/firefox/153.1.0/releasenotes/)\n - [153.2.0 ESR](/firefox/153.2.0/releasenotes/)\n\n\n\n\n - ** [152.0.0](/firefox/152.0/releasenotes/)**\n\n\n - [152.0.1](/firefox/152.0.1/releasenotes/)\n - [152.0.2](/firefox/152.0.2/releasenotes/)\n - [152.0.3](/firefox/152.0.3/releasenotes/)\n - [152.0.4](/firefox/152.0.4/releasenotes/)\n - [152.0.5](/firefox/152.0.5/releasenotes/)\n - [152.0.6](/firefox/152.0.6/releasenotes/)\n\n\n\n\n - ** [151.0.0](/firefox/151.0/releasenotes/)**\n\n\n - [151.0.1](/firefox/151.0.1/releasenotes/)\n - [151.0.2](/firefox/151.0.2/releasenotes/)\n - [151.0.3](/firefox/151.0.3/releasenotes/)\n - [151.0.4](/firefox/151.0.4/releasenotes/)\n\n\n\n\n - ** [150.0.0](/firefox/150.0/releasenotes/)**\n\n\n - [150.0.1](/firefox/150.0.1/releasenotes/)\n - [150.0.2](/firefox/150.0.2/releasenotes/)\n - [150.0.3](/firefox/150.0.3/releasenotes/)\n\n\n\n\n - ** [149.0.0](/firefox/149.0/releasenotes/)**\n\n\n - [149.0.2](/firefox/149.0.2/releasenotes/)\n\n\n\n\n - ** [148.0.0](/firefox/148.0/releasenotes/)**\n\n\n - [148.0.2](/firefox/148.0.2/releasenotes/)\n\n\n\n\n - ** [147.0.0](/firefox/147.0/releasenotes/)**\n\n\n - [147.0.1](/firefox/147.0.1/releasenotes/)\n - [147.0.2](/firefox/147.0.2/releasenotes/)\n - [147.0.3](/firefox/147.0.3/releasenotes/)\n - [147.0.4](/firefox/147.0.4/releasenotes/)\n\n\n\n\n - ** [146.0.0](/firefox/146.0/releasenotes/)**\n\n\n - [146.0.1](/firefox/146.0.1/releasenotes/)\n\n\n\n\n - ** [145.0.0](/firefox/145.0/releasenotes/)**\n\n\n - [145.0.1](/firefox/145.0.1/releasenotes/)\n - [145.0.2](/firefox/145.0.2/releasenotes/)\n\n\n\n\n - ** [144.0.0](/firefox/144.0/releasenotes/)**\n\n\n - [144.0.2](/firefox/144.0.2/releasenotes/)\n\n\n\n\n - ** [143.0.0](/firefox/143.0/releasenotes/)**\n\n\n - [143.0.1](/firefox/143.0.1/releasenotes/)\n - [143.0.3](/firefox/143.0.3/releasenotes/)\n - [143.0.4](/firefox/143.0.4/releasenotes/)\n\n\n\n\n - ** [142.0.0](/firefox/142.0/releasenotes/)**\n\n\n - [142.0.1](/firefox/142.0.1/releasenotes/)\n\n\n\n\n - ** [141.0.0](/firefox/141.0/releasenotes/)**\n\n\n - [141.0.2](/firefox/141.0.2/releasenotes/)\n - [141.0.3](/firefox/141.0.3/releasenotes/)\n\n\n\n\n - ** [140.0.0](/firefox/140.0/releasenotes/)**\n\n\n - [140.0.1](/firefox/140.0.1/releasenotes/)\n - [140.0.2](/firefox/140.0.2/releasenotes/)\n - [140.0.4](/firefox/140.0.4/releasenotes/)\n\n\n - [140.0 ESR](/firefox/140.0esr/releasenotes/)\n - [140.1.0 ESR](/firefox/140.1.0/releasenotes/)\n - [140.2.0 ESR](/firefox/140.2.0/releasenotes/)\n - [140.3.0 ESR](/firefox/140.3.0/releasenotes/)\n - [140.3.1 ESR](/firefox/140.3.1/releasenotes/)\n - [140.4.0 ESR](/firefox/140.4.0/releasenotes/)\n - [140.5.0 ESR](/firefox/140.5.0/releasenotes/)\n - [140.6.0 ESR](/firefox/140.6.0/releasenotes/)\n - [140.7.0 ESR](/firefox/140.7.0/releasenotes/)\n - [140.7.1 ESR](/firefox/140.7.1/releasenotes/)\n - [140.8.0 ESR](/firefox/140.8.0/releasenotes/)\n - [140.9.0 ESR](/firefox/140.9.0/releasenotes/)\n - [140.9.1 ESR](/firefox/140.9.1/releasenotes/)\n - [140.10.0 ESR](/firefox/140.10.0/releasenotes/)\n - [140.10.1 ESR](/firefox/140.10.1/releasenotes/)\n - [140.10.2 ESR](/firefox/140.10.2/releasenotes/)\n - [140.11.0 ESR](/firefox/140.11.0/releasenotes/)\n - [140.12.0 ESR](/firefox/140.12.0/releasenotes/)\n - [140.13.0 ESR](/firefox/140.13.0/releasenotes/)\n - [140.14.0 ESR](/firefox/140.14.0/releasenotes/)\n - [140.15.0 ESR](/firefox/140.15.0/releasenotes/)\n\n\n\n\n - ** [139.0.0](/firefox/139.0/releasenotes/)**\n\n\n - [139.0.1](/firefox/139.0.1/releasenotes/)\n - [139.0.4](/firefox/139.0.4/releasenotes/)\n\n\n\n\n - ** [138.0.0](/firefox/138.0/releasenotes/)**\n\n\n - [138.0.1](/firefox/138.0.1/releasenotes/)\n - [138.0.3](/firefox/138.0.3/releasenotes/)\n - [138.0.4](/firefox/138.0.4/releasenotes/)\n\n\n\n\n - ** [137.0.0](/firefox/137.0/releasenotes/)**\n\n\n - [137.0.1](/firefox/137.0.1/releasenotes/)\n - [137.0.2](/firefox/137.0.2/releasenotes/)\n\n\n\n\n - ** [136.0.0](/firefox/136.0/releasenotes/)**\n\n\n - [136.0.1](/firefox/136.0.1/releasenotes/)\n - [136.0.2](/firefox/136.0.2/releasenotes/)\n - [136.0.3](/firefox/136.0.3/releasenotes/)\n - [136.0.4](/firefox/136.0.4/releasenotes/)\n\n\n\n\n - ** [135.0.0](/firefox/135.0/releasenotes/)**\n\n\n - [135.0.1](/firefox/135.0.1/releasenotes/)\n\n\n\n\n - ** [134.0.0](/firefox/134.0/releasenotes/)**\n\n\n - [134.0.1](/firefox/134.0.1/releasenotes/)\n - [134.0.2](/firefox/134.0.2/releasenotes/)\n\n\n\n\n - ** [133.0.0](/firefox/133.0/releasenotes/)**\n\n\n - [133.0.3](/firefox/133.0.3/releasenotes/)\n\n\n\n\n - ** [132.0.0](/firefox/132.0/releasenotes/)**\n\n\n - [132.0.1](/firefox/132.0.1/releasenotes/)\n - [132.0.2](/firefox/132.0.2/releasenotes/)\n\n\n\n\n - ** [131.0.0](/firefox/131.0/releasenotes/)**\n\n\n - [131.0.2](/firefox/131.0.2/releasenotes/)\n - [131.0.3](/firefox/131.0.3/releasenotes/)\n\n\n\n\n - ** [130.0.0](/firefox/130.0/releasenotes/)**\n\n\n - [130.0.1](/firefox/130.0.1/releasenotes/)\n\n\n\n\n - ** [129.0.0](/firefox/129.0/releasenotes/)**\n\n\n - [129.0.1](/firefox/129.0.1/releasenotes/)\n - [129.0.2](/firefox/129.0.2/releasenotes/)\n\n\n\n\n - ** [128.0.0](/firefox/128.0/releasenotes/)**\n\n\n - [128.0.2](/firefox/128.0.2/releasenotes/)\n - [128.0.3](/firefox/128.0.3/releasenotes/)\n\n\n - [128.0 ESR](/firefox/128.0esr/releasenotes/)\n - [128.1.0 ESR](/firefox/128.1.0/releasenotes/)\n - [128.2.0 ESR](/firefox/128.2.0/releasenotes/)\n - [128.3.0 ESR](/firefox/128.3.0/releasenotes/)\n - [128.3.1 ESR](/firefox/128.3.1/releasenotes/)\n - [128.4.0 ESR](/firefox/128.4.0/releasenotes/)\n - [128.5.0 ESR](/firefox/128.5.0/releasenotes/)\n - [128.5.1 ESR](/firefox/128.5.1/releasenotes/)\n - [128.5.2 ESR](/firefox/128.5.2/releasenotes/)\n - [128.6.0 ESR](/firefox/128.6.0/releasenotes/)\n - [128.7.0 ESR](/firefox/128.7.0/releasenotes/)\n - [128.8.0 ESR](/firefox/128.8.0/releasenotes/)\n - [128.8.1 ESR](/firefox/128.8.1/releasenotes/)\n - [128.9.0 ESR](/firefox/128.9.0/releasenotes/)\n - [128.10.0 ESR](/firefox/128.10.0/releasenotes/)\n - [128.10.1 ESR](/firefox/128.10.1/releasenotes/)\n - [128.11.0 ESR](/firefox/128.11.0/releasenotes/)\n - [128.12.0 ESR](/firefox/128.12.0/releasenotes/)\n - [128.13.0 ESR](/firefox/128.13.0/releasenotes/)\n - [128.14.0 ESR](/firefox/128.14.0/releasenotes/)\n\n\n\n\n - ** [127.0.0](/firefox/127.0/releasenotes/)**\n\n\n - [127.0.1](/firefox/127.0.1/releasenotes/)\n - [127.0.2](/firefox/127.0.2/releasenotes/)\n\n\n\n\n - ** [126.0.0](/firefox/126.0/releasenotes/)**\n\n\n - [126.0.1](/firefox/126.0.1/releasenotes/)\n\n\n\n\n - ** [125.0.1.0](/firefox/125.0.1/releasenotes/)**\n\n\n - [125.0.2](/firefox/125.0.2/releasenotes/)\n - [125.0.3](/firefox/125.0.3/releasenotes/)\n\n\n\n\n - ** [124.0.0](/firefox/124.0/releasenotes/)**\n\n\n - [124.0.1](/firefox/124.0.1/releasenotes/)\n - [124.0.2](/firefox/124.0.2/releasenotes/)\n\n\n\n\n - ** [123.0.0](/firefox/123.0/releasenotes/)**\n\n\n - [123.0.1](/firefox/123.0.1/releasenotes/)\n\n\n\n\n - ** [122.0.0](/firefox/122.0/releasenotes/)**\n\n\n - [122.0.1](/firefox/122.0.1/releasenotes/)\n\n\n\n\n - ** [121.0.0](/firefox/121.0/releasenotes/)**\n\n\n - [121.0.1](/firefox/121.0.1/releasenotes/)\n\n\n\n\n - ** [120.0.0](/firefox/120.0/releasenotes/)**\n\n\n - [120.0.1](/firefox/120.0.1/releasenotes/)\n\n\n\n\n - ** [119.0.0](/firefox/119.0/releasenotes/)**\n\n\n - [119.0.1](/firefox/119.0.1/releasenotes/)\n\n\n\n\n - ** [118.0.0](/firefox/118.0/releasenotes/)**\n\n\n - [118.0.1](/firefox/118.0.1/releasenotes/)\n - [118.0.2](/firefox/118.0.2/releasenotes/)\n\n\n\n\n - ** [117.0.0](/firefox/117.0/releasenotes/)**\n\n\n - [117.0.1](/firefox/117.0.1/releasenotes/)\n\n\n\n\n - 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[76.0.1](/firefox/76.0.1/releasenotes/)\n\n\n\n\n - ** [75.0.0](/firefox/75.0/releasenotes/)**\n - ** [74.0.0](/firefox/74.0/releasenotes/)**\n\n\n - [74.0.1](/firefox/74.0.1/releasenotes/)\n\n\n\n\n - ** [73.0.0](/firefox/73.0/releasenotes/)**\n\n\n - [73.0.1](/firefox/73.0.1/releasenotes/)\n\n\n\n\n - ** [72.0.0](/firefox/72.0/releasenotes/)**\n\n\n - [72.0.1](/firefox/72.0.1/releasenotes/)\n - [72.0.2](/firefox/72.0.2/releasenotes/)\n\n\n\n\n - ** [71.0.0](/firefox/71.0/releasenotes/)**\n - ** [70.0.0](/firefox/70.0/releasenotes/)**\n\n\n - [70.0.1](/firefox/70.0.1/releasenotes/)\n\n\n\n\n - ** [69.0.0](/firefox/69.0/releasenotes/)**\n\n\n - [69.0.1](/firefox/69.0.1/releasenotes/)\n - [69.0.2](/firefox/69.0.2/releasenotes/)\n - [69.0.3](/firefox/69.0.3/releasenotes/)\n\n\n\n\n - ** [68.0.0](/firefox/68.0/releasenotes/)**\n\n\n - [68.0.1](/firefox/68.0.1/releasenotes/)\n - [68.0.2](/firefox/68.0.2/releasenotes/)\n\n\n - [68.0 ESR](/firefox/68.0esr/releasenotes/)\n - [68.0.1 ESR](/firefox/68.0.1/releasenotes/)\n - 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** [66.0.0](/firefox/66.0/releasenotes/)**\n\n\n - [66.0.1](/firefox/66.0.1/releasenotes/)\n - [66.0.2](/firefox/66.0.2/releasenotes/)\n - [66.0.3](/firefox/66.0.3/releasenotes/)\n - [66.0.4](/firefox/66.0.4/releasenotes/)\n - [66.0.5](/firefox/66.0.5/releasenotes/)\n\n\n\n\n - ** [65.0.0](/firefox/65.0/releasenotes/)**\n\n\n - [65.0.1](/firefox/65.0.1/releasenotes/)\n - [65.0.2](/firefox/65.0.2/releasenotes/)\n\n\n\n\n - ** [64.0.0](/firefox/64.0/releasenotes/)**\n\n\n - [64.0.2](/firefox/64.0.2/releasenotes/)\n\n\n\n\n - ** [63.0.0](/firefox/63.0/releasenotes/)**\n\n\n - [63.0.1](/firefox/63.0.1/releasenotes/)\n - [63.0.3](/firefox/63.0.3/releasenotes/)\n\n\n\n\n - ** [62.0.0](/firefox/62.0/releasenotes/)**\n\n\n - [62.0.2](/firefox/62.0.2/releasenotes/)\n - [62.0.3](/firefox/62.0.3/releasenotes/)\n\n\n\n\n - ** [61.0.0](/firefox/61.0/releasenotes/)**\n\n\n - [61.0.1](/firefox/61.0.1/releasenotes/)\n - [61.0.2](/firefox/61.0.2/releasenotes/)\n\n\n\n\n - ** [60.0.0](/firefox/60.0/releasenotes/)**\n\n\n - [60.0.1](/firefox/60.0.1/releasenotes/)\n - [60.0.2](/firefox/60.0.2/releasenotes/)\n\n\n - [60.0 ESR](/firefox/60.0esr/releasenotes/)\n - [60.0.1 ESR](/firefox/60.0.1/releasenotes/)\n - [60.0.2 ESR](/firefox/60.0.2/releasenotes/)\n - [60.1.0 ESR](/firefox/60.1.0/releasenotes/)\n - [60.2.0 ESR](/firefox/60.2.0/releasenotes/)\n - [60.2.1 ESR](/firefox/60.2.1/releasenotes/)\n - [60.2.2 ESR](/firefox/60.2.2/releasenotes/)\n - [60.3.0 ESR](/firefox/60.3.0/releasenotes/)\n - [60.4.0 ESR](/firefox/60.4.0/releasenotes/)\n - [60.5.0 ESR](/firefox/60.5.0/releasenotes/)\n - [60.5.1 ESR](/firefox/60.5.1/releasenotes/)\n - [60.5.2 ESR](/firefox/60.5.2/releasenotes/)\n - [60.6.0 ESR](/firefox/60.6.0/releasenotes/)\n - [60.6.1 ESR](/firefox/60.6.1/releasenotes/)\n - [60.6.2 ESR](/firefox/60.6.2/releasenotes/)\n - [60.6.3 ESR](/firefox/60.6.3/releasenotes/)\n - [60.7.0 ESR](/firefox/60.7.0/releasenotes/)\n - [60.7.1 ESR](/firefox/60.7.1/releasenotes/)\n - [60.7.2 ESR](/firefox/60.7.2/releasenotes/)\n - [60.8.0 ESR](/firefox/60.8.0/releasenotes/)\n - [60.9.0 ESR](/firefox/60.9.0/releasenotes/)\n\n\n\n\n - ** [59.0.0](/firefox/59.0/releasenotes/)**\n\n\n - [59.0.1](/firefox/59.0.1/releasenotes/)\n - [59.0.2](/firefox/59.0.2/releasenotes/)\n - [59.0.3](/firefox/59.0.3/releasenotes/)\n\n\n\n\n - ** [58.0.0](/firefox/58.0/releasenotes/)**\n\n\n - [58.0.1](/firefox/58.0.1/releasenotes/)\n - [58.0.2](/firefox/58.0.2/releasenotes/)\n\n\n\n\n - ** [57.0.0](/firefox/57.0/releasenotes/)**\n\n\n - [57.0.1](/firefox/57.0.1/releasenotes/)\n - [57.0.2](/firefox/57.0.2/releasenotes/)\n - [57.0.3](/firefox/57.0.3/releasenotes/)\n - [57.0.4](/firefox/57.0.4/releasenotes/)\n\n\n\n\n - ** [56.0.0](/firefox/56.0/releasenotes/)**\n\n\n - [56.0.1](/firefox/56.0.1/releasenotes/)\n - [56.0.2](/firefox/56.0.2/releasenotes/)\n\n\n\n\n - ** [55.0.0](/firefox/55.0/releasenotes/)**\n\n\n - [55.0.1](/firefox/55.0.1/releasenotes/)\n - [55.0.2](/firefox/55.0.2/releasenotes/)\n - [55.0.3](/firefox/55.0.3/releasenotes/)\n\n\n\n\n - ** [54.0.0](/firefox/54.0/releasenotes/)**\n\n\n - [54.0.1](/firefox/54.0.1/releasenotes/)\n\n\n\n\n - ** [53.0.0](/firefox/53.0/releasenotes/)**\n\n\n - [53.0.2](/firefox/53.0.2/releasenotes/)\n - [53.0.3](/firefox/53.0.3/releasenotes/)\n\n\n\n\n - ** [52.0.0](/firefox/52.0/releasenotes/)**\n\n\n - [52.0.1](/firefox/52.0.1/releasenotes/)\n - [52.0.2](/firefox/52.0.2/releasenotes/)\n\n\n - [52.0 ESR](/firefox/52.0esr/releasenotes/)\n - [52.0.1 ESR](/firefox/52.0.1/releasenotes/)\n - [52.0.2 ESR](/firefox/52.0.2/releasenotes/)\n - [52.1.0 ESR](/firefox/52.1.0/releasenotes/)\n - [52.1.1 ESR](/firefox/52.1.1/releasenotes/)\n - [52.1.2 ESR](/firefox/52.1.2/releasenotes/)\n - [52.2.0 ESR](/firefox/52.2.0/releasenotes/)\n - [52.2.1 ESR](/firefox/52.2.1/releasenotes/)\n - [52.3.0 ESR](/firefox/52.3.0/releasenotes/)\n - [52.4.0 ESR](/firefox/52.4.0/releasenotes/)\n - [52.4.1 ESR](/firefox/52.4.1/releasenotes/)\n - [52.5.0 ESR](/firefox/52.5.0/releasenotes/)\n - [52.5.2 ESR](/firefox/52.5.2/releasenotes/)\n - [52.5.3 ESR](/firefox/52.5.3/releasenotes/)\n - [52.6.0 ESR](/firefox/52.6.0/releasenotes/)\n - [52.7.0 ESR](/firefox/52.7.0/releasenotes/)\n - [52.7.1 ESR](/firefox/52.7.1/releasenotes/)\n - [52.7.2 ESR](/firefox/52.7.2/releasenotes/)\n - [52.7.3 ESR](/firefox/52.7.3/releasenotes/)\n - [52.7.4 ESR](/firefox/52.7.4/releasenotes/)\n - [52.8.0 ESR](/firefox/52.8.0/releasenotes/)\n - [52.8.1 ESR](/firefox/52.8.1/releasenotes/)\n - [52.9.0 ESR](/firefox/52.9.0/releasenotes/)\n\n\n\n\n - ** [51.0.0](/firefox/51.0/releasenotes/)**\n\n\n - [51.0.1](/firefox/51.0.1/releasenotes/)\n\n\n\n\n - ** [50.0.0](/firefox/50.0/releasenotes/)**\n\n\n - [50.0.1](/firefox/50.0.1/releasenotes/)\n - [50.0.2](/firefox/50.0.2/releasenotes/)\n - [50.1.0](/firefox/50.1.0/releasenotes/)\n\n\n\n\n - ** [49.0.0](/firefox/49.0/releasenotes/)**\n\n\n - [49.0.1](/firefox/49.0.1/releasenotes/)\n - [49.0.2](/firefox/49.0.2/releasenotes/)\n\n\n\n\n - ** [48.0.0](/firefox/48.0/releasenotes/)**\n\n\n - [48.0.1](/firefox/48.0.1/releasenotes/)\n - [48.0.2](/firefox/48.0.2/releasenotes/)\n\n\n\n\n - ** [47.0.0](/firefox/47.0/releasenotes/)**\n\n\n - [47.0.1](/firefox/47.0.1/releasenotes/)\n - [47.0.2](/firefox/47.0.2/releasenotes/)\n\n\n\n\n - ** [46.0.0](/firefox/46.0/releasenotes/)**\n\n\n - [46.0.1](/firefox/46.0.1/releasenotes/)\n\n\n\n\n - ** [45.0.0](/firefox/45.0/releasenotes/)**\n\n\n - [45.0.1](/firefox/45.0.1/releasenotes/)\n - [45.0.2](/firefox/45.0.2/releasenotes/)\n\n\n - [45.0 ESR](/firefox/45.0esr/releasenotes/)\n - [45.0.1 ESR](/firefox/45.0.1/releasenotes/)\n - [45.0.2 ESR](/firefox/45.0.2/releasenotes/)\n - [45.1.0 ESR](/firefox/45.1.0/releasenotes/)\n - [45.1.1 ESR](/firefox/45.1.1/releasenotes/)\n - [45.2.0 ESR](/firefox/45.2.0/releasenotes/)\n - [45.3.0 ESR](/firefox/45.3.0/releasenotes/)\n - [45.4.0 ESR](/firefox/45.4.0/releasenotes/)\n - [45.5.0 ESR](/firefox/45.5.0/releasenotes/)\n - [45.5.1 ESR](/firefox/45.5.1/releasenotes/)\n - [45.6.0 ESR](/firefox/45.6.0/releasenotes/)\n - [45.7.0 ESR](/firefox/45.7.0/releasenotes/)\n - [45.8.0 ESR](/firefox/45.8.0/releasenotes/)\n - [45.9.0 ESR](/firefox/45.9.0/releasenotes/)\n\n\n\n\n - ** [44.0.0](/firefox/44.0/releasenotes/)**\n\n\n - [44.0.1](/firefox/44.0.1/releasenotes/)\n - [44.0.2](/firefox/44.0.2/releasenotes/)\n\n\n\n\n - ** [43.0.0](/firefox/43.0/releasenotes/)**\n\n\n - [43.0.1](/firefox/43.0.1/releasenotes/)\n - [43.0.2](/firefox/43.0.2/releasenotes/)\n - [43.0.3](/firefox/43.0.3/releasenotes/)\n - [43.0.4](/firefox/43.0.4/releasenotes/)\n\n\n\n\n - ** [42.0.0](/firefox/42.0/releasenotes/)**\n - ** [41.0.0](/firefox/41.0/releasenotes/)**\n\n\n - [41.0.1](/firefox/41.0.1/releasenotes/)\n - [41.0.2](/firefox/41.0.2/releasenotes/)\n\n\n\n\n - ** [40.0.0](/firefox/40.0/releasenotes/)**\n\n\n - [40.0.2](/firefox/40.0.2/releasenotes/)\n - [40.0.3](/firefox/40.0.3/releasenotes/)\n\n\n\n\n - ** [39.0.0](/firefox/39.0/releasenotes/)**\n\n\n - [39.0.3](/firefox/39.0.3/releasenotes/)\n\n\n\n\n - ** [38.0.0](/firefox/38.0/releasenotes/)**\n\n\n - [38.0.1](/firefox/38.0.1/releasenotes/)\n - [38.0.5](/firefox/38.0.5/releasenotes/)\n\n\n - [38.1.0 ESR](/firefox/38.1.0/releasenotes/)\n - [38.1.1 ESR](/firefox/38.1.1/releasenotes/)\n - [38.2.0 ESR](/firefox/38.2.0/releasenotes/)\n - [38.2.1 ESR](/firefox/38.2.1/releasenotes/)\n - [38.3.0 ESR](/firefox/38.3.0/releasenotes/)\n - [38.4.0 ESR](/firefox/38.4.0/releasenotes/)\n - [38.5.0 ESR](/firefox/38.5.0/releasenotes/)\n - [38.5.1 ESR](/firefox/38.5.1/releasenotes/)\n - [38.5.2 ESR](/firefox/38.5.2/releasenotes/)\n - [38.6.0 ESR](/firefox/38.6.0/releasenotes/)\n - [38.6.1 ESR](/firefox/38.6.1/releasenotes/)\n - [38.7.0 ESR](/firefox/38.7.0/releasenotes/)\n - [38.7.1 ESR](/firefox/38.7.1/releasenotes/)\n - [38.8.0 ESR](/firefox/38.8.0/releasenotes/)\n\n\n\n\n - ** [37.0.0](/firefox/37.0/releasenotes/)**\n\n\n - [37.0.1](/firefox/37.0.1/releasenotes/)\n - [37.0.2](/firefox/37.0.2/releasenotes/)\n\n\n\n\n - ** [36.0.0](/firefox/36.0/releasenotes/)**\n\n\n - [36.0.1](/firefox/36.0.1/releasenotes/)\n - [36.0.3](/firefox/36.0.3/releasenotes/)\n - [36.0.4](/firefox/36.0.4/releasenotes/)\n\n\n\n\n - ** [35.0.0](/firefox/35.0/releasenotes/)**\n\n\n - [35.0.1](/firefox/35.0.1/releasenotes/)\n\n\n\n\n - ** [34.0.0](/firefox/34.0/releasenotes/)**\n\n\n - [34.0.5](/firefox/34.0.5/releasenotes/)\n\n\n\n\n - ** [33.1.0](/firefox/33.1/releasenotes/)**\n\n\n - [33.1.1](/firefox/33.1.1/releasenotes/)\n\n\n\n\n - ** [33.0.0](/firefox/33.0/releasenotes/)**\n\n\n - [33.0.1](/firefox/33.0.1/releasenotes/)\n - [33.0.2](/firefox/33.0.2/releasenotes/)\n - [33.0.3](/firefox/33.0.3/releasenotes/)\n\n\n\n\n - ** [32.0.0](/firefox/32.0/releasenotes/)**\n\n\n - [32.0.1](/firefox/32.0.1/releasenotes/)\n - [32.0.2](/firefox/32.0.2/releasenotes/)\n - [32.0.3](/firefox/32.0.3/releasenotes/)\n\n\n\n\n - ** [31.0.0](/firefox/31.0/releasenotes/)**\n\n\n - [31.0.0 ESR](/firefox/31.0.0/releasenotes/)\n - [31.1.0 ESR](/firefox/31.1.0/releasenotes/)\n - [31.1.1 ESR](/firefox/31.1.1/releasenotes/)\n - [31.2.0 ESR](/firefox/31.2.0/releasenotes/)\n - [31.3.0 ESR](/firefox/31.3.0/releasenotes/)\n - [31.4.0 ESR](/firefox/31.4.0/releasenotes/)\n - [31.5.0 ESR](/firefox/31.5.0/releasenotes/)\n - [31.5.2 ESR](/firefox/31.5.2/releasenotes/)\n - [31.5.3 ESR](/firefox/31.5.3/releasenotes/)\n - [31.6.0 ESR](/firefox/31.6.0/releasenotes/)\n - [31.7.0 ESR](/firefox/31.7.0/releasenotes/)\n - [31.8.0 ESR](/firefox/31.8.0/releasenotes/)\n\n\n\n\n - ** [30.0.0](/firefox/30.0/releasenotes/)**\n - ** [29.0.0](/firefox/29.0/releasenotes/)**\n\n\n - [29.0.1](/firefox/29.0.1/releasenotes/)\n\n\n\n\n - ** [28.0.0](/firefox/28.0/releasenotes/)**\n - ** [27.0.0](/firefox/27.0/releasenotes/)**\n\n\n - [27.0.1](/firefox/27.0.1/releasenotes/)\n\n\n\n\n - ** [26.0.0](/firefox/26.0/releasenotes/)**\n - ** [25.0.0](/firefox/25.0/releasenotes/)**\n\n\n - [25.0.1](/firefox/25.0.1/releasenotes/)\n\n\n\n\n - ** [24.0.0](/firefox/24.0/releasenotes/)**\n\n\n - [24.1.0 ESR](/firefox/24.1.0/releasenotes/)\n - [24.1.1 ESR](/firefox/24.1.1/releasenotes/)\n - [24.2.0 ESR](/firefox/24.2.0/releasenotes/)\n - [24.3.0 ESR](/firefox/24.3.0/releasenotes/)\n - [24.4.0 ESR](/firefox/24.4.0/releasenotes/)\n - [24.5.0 ESR](/firefox/24.5.0/releasenotes/)\n - [24.6.0 ESR](/firefox/24.6.0/releasenotes/)\n - [24.7.0 ESR](/firefox/24.7.0/releasenotes/)\n - [24.8.0 ESR](/firefox/24.8.0/releasenotes/)\n - [24.8.1 ESR](/firefox/24.8.1/releasenotes/)\n\n\n\n\n - ** [23.0.0](/firefox/23.0/releasenotes/)**\n\n\n - [23.0.1](/firefox/23.0.1/releasenotes/)\n\n\n\n\n - ** [22.0.0](/firefox/22.0/releasenotes/)**\n - ** [21.0.0](/firefox/21.0/releasenotes/)**\n - ** [20.0.0](/firefox/20.0/releasenotes/)**\n\n\n - [20.0.1](/firefox/20.0.1/releasenotes/)\n\n\n\n\n - ** [19.0.0](/firefox/19.0/releasenotes/)**\n\n\n - [19.0.1](/firefox/19.0.1/releasenotes/)\n - [19.0.2](/firefox/19.0.2/releasenotes/)\n\n\n\n\n - ** [18.0.0](/firefox/18.0/releasenotes/)**\n\n\n - [18.0.1](/firefox/18.0.1/releasenotes/)\n - [18.0.2](/firefox/18.0.2/releasenotes/)\n\n\n\n\n - ** [17.0.0](/firefox/17.0/releasenotes/)**\n\n\n - [17.0.6](/firefox/17.0.6/releasenotes/)\n - [17.0.7](/firefox/17.0.7/releasenotes/)\n - [17.0.8](/firefox/17.0.8/releasenotes/)\n - [17.0.9](/firefox/17.0.9/releasenotes/)\n - [17.0.10](/firefox/17.0.10/releasenotes/)\n - [17.0.11](/firefox/17.0.11/releasenotes/)\n\n\n - [17.0.1 ESR](/firefox/17.0.1/releasenotes/)\n - [17.0.2 ESR](/firefox/17.0.2/releasenotes/)\n - [17.0.3 ESR](/firefox/17.0.3/releasenotes/)\n - [17.0.4 ESR](/firefox/17.0.4/releasenotes/)\n - [17.0.5 ESR](/firefox/17.0.5/releasenotes/)\n\n\n\n\n - ** [16.0.0](/firefox/16.0/releasenotes/)**\n\n\n - [16.0.1](/firefox/16.0.1/releasenotes/)\n - [16.0.2](/firefox/16.0.2/releasenotes/)\n\n\n\n\n - ** [15.0.0](/firefox/15.0/releasenotes/)**\n\n\n - [15.0.1](/firefox/15.0.1/releasenotes/)\n\n\n\n\n - ** [14.0.1.0](/firefox/14.0.1/releasenotes/)**\n - ** [13.0.0](/firefox/13.0/releasenotes/)**\n\n\n - [13.0.1](/firefox/13.0.1/releasenotes/)\n\n\n\n\n - ** [12.0.0](/firefox/12.0/releasenotes/)**\n - ** [11.0.0](/firefox/11.0/releasenotes/)**\n - ** [10.0.0](/firefox/10.0/releasenotes/)**\n\n\n - [10.0.1](/firefox/10.0.1/releasenotes/)\n - [10.0.2](/firefox/10.0.2/releasenotes/)\n\n\n - [10.0.3 ESR](/firefox/10.0.3/releasenotes/)\n - [10.0.4 ESR](/firefox/10.0.4/releasenotes/)\n - [10.0.5 ESR](/firefox/10.0.5/releasenotes/)\n - [10.0.6 ESR](/firefox/10.0.6/releasenotes/)\n - [10.0.7 ESR](/firefox/10.0.7/releasenotes/)\n - [10.0.8 ESR](/firefox/10.0.8/releasenotes/)\n - [10.0.9 ESR](/firefox/10.0.9/releasenotes/)\n - [10.0.10 ESR](/firefox/10.0.10/releasenotes/)\n - [10.0.11 ESR](/firefox/10.0.11/releasenotes/)\n - [10.0.12 ESR](/firefox/10.0.12/releasenotes/)\n\n\n\n\n - ** [9.0.0](/firefox/9.0/releasenotes/)**\n\n\n - [9.0.1](/firefox/9.0.1/releasenotes/)\n\n\n\n\n - ** [8.0.0](/firefox/8.0/releasenotes/)**\n\n\n - [8.0.1](/firefox/8.0.1/releasenotes/)\n\n\n\n\n - ** [7.0.0](/firefox/7.0/releasenotes/)**\n\n\n - [7.0.1](/firefox/7.0.1/releasenotes/)\n\n\n\n\n - ** [6.0.0](/firefox/6.0/releasenotes/)**\n\n\n - [6.0.1](/firefox/6.0.1/releasenotes/)\n - [6.0.2](/firefox/6.0.2/releasenotes/)\n\n\n\n\n - ** [5.0.0](/firefox/5.0/releasenotes/)**\n\n\n - [5.0.1](/firefox/5.0.1/releasenotes/)\n\n\n\n\n - ** [4.0.0](/firefox/4.0/releasenotes/)**\n\n\n - [4.0.1](/firefox/4.0.1/releasenotes/)\n\n\n\n\n - ** [3.6.0](/firefox/3.6/releasenotes/)**\n\n\n - [3.6.2](/firefox/3.6.2/releasenotes/)\n - [3.6.3](/firefox/3.6.3/releasenotes/)\n - [3.6.4](/firefox/3.6.4/releasenotes/)\n - [3.6.6](/firefox/3.6.6/releasenotes/)\n - [3.6.7](/firefox/3.6.7/releasenotes/)\n - [3.6.8](/firefox/3.6.8/releasenotes/)\n - [3.6.9](/firefox/3.6.9/releasenotes/)\n - [3.6.10](/firefox/3.6.10/releasenotes/)\n - [3.6.11](/firefox/3.6.11/releasenotes/)\n - [3.6.12](/firefox/3.6.12/releasenotes/)\n - [3.6.13](/firefox/3.6.13/releasenotes/)\n - [3.6.14](/firefox/3.6.14/releasenotes/)\n - [3.6.15](/firefox/3.6.15/releasenotes/)\n - [3.6.16](/firefox/3.6.16/releasenotes/)\n - [3.6.17](/firefox/3.6.17/releasenotes/)\n - [3.6.18](/firefox/3.6.18/releasenotes/)\n - [3.6.19](/firefox/3.6.19/releasenotes/)\n - [3.6.20](/firefox/3.6.20/releasenotes/)\n - [3.6.21](/firefox/3.6.21/releasenotes/)\n - [3.6.22](/firefox/3.6.22/releasenotes/)\n - [3.6.23](/firefox/3.6.23/releasenotes/)\n - [3.6.24](/firefox/3.6.24/releasenotes/)\n - [3.6.25](/firefox/3.6.25/releasenotes/)\n - [3.6.26](/firefox/3.6.26/releasenotes/)\n - [3.6.27](/firefox/3.6.27/releasenotes/)\n - [3.6.28](/firefox/3.6.28/releasenotes/)\n\n\n\n\n - ** [3.5.0](/firefox/3.5/releasenotes/)**\n\n\n - [3.5.1](/firefox/3.5.1/releasenotes/)\n - [3.5.2](/firefox/3.5.2/releasenotes/)\n - [3.5.3](/firefox/3.5.3/releasenotes/)\n - [3.5.4](/firefox/3.5.4/releasenotes/)\n - [3.5.5](/firefox/3.5.5/releasenotes/)\n - [3.5.6](/firefox/3.5.6/releasenotes/)\n - [3.5.7](/firefox/3.5.7/releasenotes/)\n - [3.5.8](/firefox/3.5.8/releasenotes/)\n - [3.5.9](/firefox/3.5.9/releasenotes/)\n - [3.5.10](/firefox/3.5.10/releasenotes/)\n - [3.5.11](/firefox/3.5.11/releasenotes/)\n - [3.5.12](/firefox/3.5.12/releasenotes/)\n - [3.5.13](/firefox/3.5.13/releasenotes/)\n - [3.5.14](/firefox/3.5.14/releasenotes/)\n - [3.5.15](/firefox/3.5.15/releasenotes/)\n - [3.5.16](/firefox/3.5.16/releasenotes/)\n - [3.5.17](/firefox/3.5.17/releasenotes/)\n - [3.5.18](/firefox/3.5.18/releasenotes/)\n - [3.5.19](/firefox/3.5.19/releasenotes/)\n\n\n\n\n - ** [3.0.0](/firefox/3.0/releasenotes/)**\n\n\n - [3.0.1](/firefox/3.0.1/releasenotes/)\n - [3.0.2](/firefox/3.0.2/releasenotes/)\n - [3.0.3](/firefox/3.0.3/releasenotes/)\n - [3.0.4](/firefox/3.0.4/releasenotes/)\n - [3.0.5](/firefox/3.0.5/releasenotes/)\n - [3.0.6](/firefox/3.0.6/releasenotes/)\n - [3.0.7](/firefox/3.0.7/releasenotes/)\n - [3.0.8](/firefox/3.0.8/releasenotes/)\n - [3.0.9](/firefox/3.0.9/releasenotes/)\n - [3.0.10](/firefox/3.0.10/releasenotes/)\n - [3.0.11](/firefox/3.0.11/releasenotes/)\n - [3.0.12](/firefox/3.0.12/releasenotes/)\n - [3.0.13](/firefox/3.0.13/releasenotes/)\n - [3.0.14](/firefox/3.0.14/releasenotes/)\n - [3.0.15](/firefox/3.0.15/releasenotes/)\n - [3.0.16](/firefox/3.0.16/releasenotes/)\n - [3.0.17](/firefox/3.0.17/releasenotes/)\n - [3.0.18](/firefox/3.0.18/releasenotes/)\n - [3.0.19](/firefox/3.0.19/releasenotes/)\n\n\n\n\n - ** [2.0.0](/firefox/2.0/releasenotes/)**\n\n\n - [2.0.0.1](/firefox/2.0.0.1/releasenotes/)\n - [2.0.0.2](/firefox/2.0.0.2/releasenotes/)\n - [2.0.0.3](/firefox/2.0.0.3/releasenotes/)\n - [2.0.0.4](/firefox/2.0.0.4/releasenotes/)\n - [2.0.0.5](/firefox/2.0.0.5/releasenotes/)\n - [2.0.0.6](/firefox/2.0.0.6/releasenotes/)\n - [2.0.0.7](/firefox/2.0.0.7/releasenotes/)\n - [2.0.0.8](/firefox/2.0.0.8/releasenotes/)\n - [2.0.0.9](/firefox/2.0.0.9/releasenotes/)\n - [2.0.0.10](/firefox/2.0.0.10/releasenotes/)\n - [2.0.0.11](/firefox/2.0.0.11/releasenotes/)\n - [2.0.0.12](/firefox/2.0.0.12/releasenotes/)\n - [2.0.0.13](/firefox/2.0.0.13/releasenotes/)\n - [2.0.0.14](/firefox/2.0.0.14/releasenotes/)\n - [2.0.0.15](/firefox/2.0.0.15/releasenotes/)\n - [2.0.0.16](/firefox/2.0.0.16/releasenotes/)\n - [2.0.0.17](/firefox/2.0.0.17/releasenotes/)\n - [2.0.0.18](/firefox/2.0.0.18/releasenotes/)\n - [2.0.0.19](/firefox/2.0.0.19/releasenotes/)\n - [2.0.0.20](/firefox/2.0.0.20/releasenotes/)\n\n\n\n\n - ** [1.5.0](/firefox/releases/1.5.html)**\n\n\n - [1.5.0.1](/firefox/releases/1.5.0.1.html)\n - [1.5.0.2](/firefox/releases/1.5.0.2.html)\n - [1.5.0.3](/firefox/releases/1.5.0.3.html)\n - [1.5.0.4](/firefox/releases/1.5.0.4.html)\n - [1.5.0.5](/firefox/releases/1.5.0.5.html)\n - [1.5.0.6](/firefox/releases/1.5.0.6.html)\n - [1.5.0.7](/firefox/releases/1.5.0.7.html)\n - [1.5.0.8](/firefox/releases/1.5.0.8.html)\n - [1.5.0.9](/firefox/releases/1.5.0.9.html)\n - [1.5.0.10](/firefox/releases/1.5.0.10.html)\n - [1.5.0.11](/firefox/releases/1.5.0.11.html)\n - [1.5.0.12](/firefox/releases/1.5.0.12.html)\n\n\n\n\n - ** [1.0.0](/firefox/releases/1.0.html)**\n\n\n - [1.0.1](/firefox/releases/1.0.1.html)\n - [1.0.2](/firefox/releases/1.0.2.html)\n - [1.0.3](/firefox/releases/1.0.3.html)\n - [1.0.4](/firefox/releases/1.0.4.html)\n - [1.0.5](/firefox/releases/1.0.5.html)\n - [1.0.6](/firefox/releases/1.0.6.html)\n - [1.0.7](/firefox/releases/1.0.7.html)\n - [1.0.8](/firefox/releases/1.0.8.html)\n\n\n\n\n - **[0.1.0](/firefox/releases/0.1.html)**\n - [0.2](/firefox/releases/0.2.html)\n - [0.3](/firefox/releases/0.3.html)\n - [0.4](/firefox/releases/0.4.html)\n - [0.5](/firefox/releases/0.5.html)\n - [0.6](/firefox/releases/0.6.html)\n - [0.6.1](/firefox/releases/0.6.1.html)\n - [0.7](/firefox/releases/0.7.html)\n - [0.7.1](/firefox/releases/0.7.1.html)\n - [0.8](/firefox/releases/0.8.html)\n - [0.9](/firefox/releases/0.9.html)\n - [0.9.1/0.9.2](/firefox/releases/0.9.1.html)\n - [0.9.3](/firefox/releases/0.9.3.html)\n - [1.0 Preview Release](/firefox/releases/0.10.html)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n - [Website Privacy Notice](https://www.mozilla.org/en-US/privacy/websites/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Terms of Use](https://www.mozilla.org/about/legal/terms/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Cookie Policy](/en-US/privacy/websites/cookie-settings/)\n - [Community Participation Guidelines](https://www.mozilla.org/en-US/about/governance/policies/participation/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Logo Trademark Licensing](https://www.mozilla.org/foundation/trademarks/policy/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n## Help us improve your firefox.com experience\n\n\n\n\n\nIn addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy.\n\n\n\n Accept All Additional Cookies Reject All Additional Cookies\n\n\n\n[Cookie settings](/en-US/privacy/websites/cookie-settings/)",
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"content": "Firefox 155.0.1, See All New Features, Updates and Fixes\n\n\n\n [](/en-US/)\n\n\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n Firefox for mobile\n\n\n\n  [Get Firefox on your phone](/en-US/mobile/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n Menu\n\n\n\n Menu\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Release Notes\n\n Menu **\n - [Desktop](/en-US/firefox/notes/)\n - [Desktop Beta & Developer Edition](/en-US/firefox/beta/notes/)\n - [Desktop Nightly](/en-US/firefox/nightly/notes/)\n - [Android](/en-US/firefox/android/155.0.1/releasenotes/)\n - [iOS](/en-US/firefox/ios/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n# See what’s new in Firefox!\n\n\n\nRelease Notes tell you what's new in Firefox. As always, we welcome your [feedback](https://connect.mozilla.org/). You can also [file a bug in Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi) or see the [system requirements](/en-US/firefox/155.0.1/system-requirements/) of this release.\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download for Linux 64-bit ** ](/thanks/)\n - [** Download for Linux ARM64 ** ](/thanks/)\n - [** Firefox for Android ** ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n - [** Firefox for iOS ** ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## 155.0.1 Firefox Release\n\n\n\nSeptember 4, 2026\n\n\n\n\n\nVersion 155.0.1, first offered to Release channel users on September 4, 2026\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Fixed\n\n\n\n\n\n\n -\n\n\n\nFixed Firefox becoming unresponsive on some pages that use CSS blur and backdrop filters together. ([Bug 2068836](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n -\n\n\n\nFixed the sidebar not reappearing after restarting Firefox when the \"Hide tabs and sidebar\" option was turned on. ([Bug 2065431](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n -\n\n\n\nFixed some profile icons not being displayed in the account and application menus. ([Bug 2064729](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D), [Bug 2067734](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n -\n\n\n\nFixed the current device being listed among connected devices in the account menu. ([Bug 2059763](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n -\n\n\n\nReference link to [155.0 release notes](https://www.firefox.com/firefox/155.0/releasenotes/).\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Unresolved\n\n\n\n\n\n\n -\n\n\n\nStandard dynamic range (SDR) video in some formats can appear washed out on macOS. The issue is under investigation and a fix will ship in a future release. ([Bug 2068961](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Get the most recent version\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download for Linux 64-bit ** ](/thanks/)\n - [** Download for Linux ARM64 ** ](/thanks/)\n - [** Firefox for Android ** ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n - [** Firefox for iOS ** ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Need help or want to leave feedback?\n\n [File a bug](https://bugzilla.mozilla.org/enter_bug.cgi) [Leave feedback](https://connect.mozilla.org/)\n\n\n\n\n\n## Get Involved\n\n\n\nDid you know that most of the content in Firefox Support was written by volunteers?\n\n [Find out more](https://support.mozilla.org/get-involved)\n\n\n\n\n\n## Other Resources\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/155) [Complete list of changes for this release](https://bugzilla.mozilla.org/buglist.cgi?j_top=%5BREDACTED%5D&f1=%5BREDACTED%5D&o3=%5BREDACTED%5D&v3=%5BREDACTED%5D&o1=%5BREDACTED%5D&resolution=%5BREDACTED%5D&o2=%5BREDACTED%5D&query_format=%5BREDACTED%5D&f3=%5BREDACTED%5D&f2=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&v1=%5BREDACTED%5D&v2=%5BREDACTED%5D&limit=%5BREDACTED%5D) [Press Kit](https://blog.mozilla.org/press/kits/) [Mozilla and Firefox News](https://blog.mozilla.org) [Firefox Extended Support Release](/en-US/browsers/enterprise/) [All Firefox for Desktop Releases](/en-US/releases/) [Learn more about Firefox](/en-US/more/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n - [Website Privacy Notice](https://www.mozilla.org/en-US/privacy/websites/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Terms of Use](https://www.mozilla.org/about/legal/terms/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Cookie Policy](/en-US/privacy/websites/cookie-settings/)\n - [Community Participation Guidelines](https://www.mozilla.org/en-US/about/governance/policies/participation/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Logo Trademark Licensing](https://www.mozilla.org/foundation/trademarks/policy/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n## Help us improve your firefox.com experience\n\n\n\n\n\nIn addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy.\n\n\n\n Accept All Additional Cookies Reject All Additional Cookies\n\n\n\n[Cookie settings](/en-US/privacy/websites/cookie-settings/)",
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"content": "Firefox 155.0, See All New Features, Updates and Fixes\n\n\n\n [](/en-US/)\n\n\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n Firefox for mobile\n\n\n\n  [Get Firefox on your phone](/en-US/mobile/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n Menu\n\n\n\n Menu\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Release Notes\n\n Menu **\n - [Desktop](/en-US/firefox/notes/)\n - [Desktop Beta & Developer Edition](/en-US/firefox/beta/notes/)\n - [Desktop Nightly](/en-US/firefox/nightly/notes/)\n - [Android](/en-US/firefox/android/155.0.1/releasenotes/)\n - [iOS](/en-US/firefox/ios/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n# Firefox Release Notes\n\n\n\nRelease Notes tell you what's new in Firefox. As always, we welcome your [feedback](https://connect.mozilla.org/). You can also [file a bug in Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi) or see the [system requirements](/en-US/firefox/155.0/system-requirements/) of this release.\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download for Linux 64-bit ** ](/thanks/)\n - [** Download for Linux ARM64 ** ](/thanks/)\n - [** Firefox for Android ** ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n - [** Firefox for iOS ** ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## 155.0 Firefox Release\n\n\n\nSeptember 1, 2026\n\n\n\n\n\nVersion 155.0, first offered to Release channel users on September 1, 2026\n\n\n\n\n\n\n\n\n\n\n - [Previous Firefox 154.0](/en-US/firefox/154.0/releasenotes/)\n\n\n\n\n\n\n\n\n\n\n\n### New\n\n\n\n\n\n\n -\n\n\n\n[Smart Window](https://www.firefox.com/smart-window) is now available for all users in the USA, Canada, and France to try out! Additionally, Firefox 155 includes many new enhancements:\n\n\n - New personalized resume conversation starters help users quickly return to topics they’ve been working on.\n\n\n\n\n\n\n - Assistant now responds much faster with Exa web search source citations to provide accurate, trustworthy web grounding in roughly 1/5 the time.\n\n\n\n\n\n\n - Organize Tabs now suggests better groupings of your related tabs and gives each group a clearer, more descriptive name.\n\n\n\n\n\n\n\n\n\n \n\nThis feature is part of a progressive roll out.\n\n What is a progressive roll out?\n\nCertain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.\n\n\n\n\n -\n\n\n\nFirefox now shows how many trackers it has blocked in the address bar, making built-in privacy protections easier to see while browsing. The count can be [hidden in settings](https://support.mozilla.org/kb/enhanced-tracking-protection-firefox-desktop#[REDACTED]) without turning off tracker blocking.\n\n\n\n\n\n \n\nThis feature is part of a progressive roll out.\n\n What is a progressive roll out?\n\nCertain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.\n\n\n\n\n -\n\n\n\nNintendo Switch Pro and compatible aftermarket controllers now work fully in web games on Windows, with the directional pad and analog sticks correctly mapped.\n\n\n\n\n -\n\n\n\n[Containers](https://support.mozilla.org/kb/how-use-firefox-containers) can now be reordered in Settings, and the new order is used wherever containers are listed.\n\n\n\n\n\n\n\n\n -\n\n\n\nThe [Translations](https://support.mozilla.org/kb/website-translation) feature now supports the following languages:\n\n\n - Marathi\n - Urdu\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Fixed\n\n\n\n\n\n\n -\n\n\n\nFixed text disappearing in Microsoft 365 Word Online and other web apps on Linux when typing with certain keyboard layouts.\n\n\n\n\n -\n\n\n\nFixed an unnecessary paste confirmation appearing when using the keyboard shortcut to paste without formatting in Google Docs.\n\n\n\n\n -\n\n\n\nFirefox now recovers from the toolbar and tab strip being left unresponsive when the platform fails to end a tab drag session.\n\n\n\n\n -\n\n\n\nFixed text inside buttons not being selectable or copyable, which prevented copying direct messages on X and comments on YouTube.\n\n\n\n\n -\n\n\n\nFixed live audio streams such as internet radio stopping when playing in the background.\n\n\n\n\n -\n\n\n\nFixed the sound indicator disappearing from a tab that was moved to another window, leaving no way to see or mute what was playing.\n\n\n\n\n -\n\n\n\nFixed Firefox preventing Linux systems from going to sleep after a long browsing session.\n\n\n\n\n -\n\n\n\nFixed full screen content being letterboxed on MacBooks with a camera notch, most visibly when watching video.\n\n\n\n\n -\n\n\n\nFixed arrow-key and Page Up/Down scrolling not working on some pages with embedded content from other sites.\n\n\n\n\n -\n\n\n\nFixed characters from some less common scripts appearing as empty boxes on web pages on Windows.\n\n\n\n\n -\n\n\n\nFixed WebCodecs `VideoEncoder` hanging on macOS when encoding a `VideoFrame` in NV12 format.\n\n\n\n\n -\n\n\n\nVarious [security fixes](https://www.mozilla.org/security/advisories/mfsa2026-82/).\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Changed\n\n\n\n\n\n\n -\n\n\n\nFirefox now limits CSS to 75 levels of nested blocks and functions, preventing crashes that extremely deep nesting can cause under some circumstances. More deeply nested rules and values no longer parse.\n\n\n\n\n -\n\n\n\nFirefox now uses firefox-portal-detection.com instead of detectportal.firefox.com to detect captive portals and check network connectivity, so network allowlists referencing the old domain need updating.\n\n\n\n\n -\n\n\n\nFirefox now opens mailto: links only in response to an explicit user action, so pages can no longer launch the default mail client unprompted.\n\n\n\n\n -\n\n\n\nPDFs smaller than the paper size can now be enlarged to fill the sheet when printing, by setting the scale above 100%.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Enterprise\n\n\n\n\n\n\n -\n\n\n\nYou can find information about policy updates and enterprise-specific bug fixes in the [Firefox for Enterprise 155 Release Notes](https://firefox-admin-docs.mozilla.org/release-notes/version/firefox-155/).\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Developer\n\n\n\n\n\n\n -\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/155)\n\n\n -\n\n\n\nThe Rules View now offers toggles to emulate the [`prefers-reduced-motion`](https://developer.mozilla.org/docs/Web/CSS/Reference/At-rules/@media/prefers-reduced-motion) media feature. Emulation options have also moved into a new panel behind the at-rules (`@`) button.\n\n\n\n\n -\n\n\n\nThe Debugger in Developer Tools now has a keyboard shortcut, Ctrl+Alt+B (Cmd+Alt+B on macOS), to enable or disable all breakpoints at once.\n\n\n\n\n -\n\n\n\nThe JSON Viewer now displays JSON Lines (JSONL/NDJSON) documents, including inline errors for invalid lines.\n\n\n\n\n -\n\n\n\nFixed the Storage panel showing cookies from private windows, containers, and other partitions alongside the inspected page's own cookies.\n\n\n\n\n -\n\n\n\nUncaught non-`Error` exceptions now list their property names in the Console instead of showing only `Object`.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Web Platform\n\n\n\n\n\n\n -\n\n\n\nThe CSS [`attr()`](https://developer.mozilla.org/docs/Web/CSS/Reference/Values/attr) function now supports values of any type, so authors can use attribute values in any property rather than only as strings in the `content` property.\n\n\n\n\n -\n\n\n\nFirefox now supports the [`progress()`](https://developer.mozilla.org/docs/Web/CSS/Reference/Values/progress) CSS function.\n\n\n\n\n -\n\n\n\nFirefox now supports the [`alpha()`](https://developer.mozilla.org/docs/Web/CSS/Reference/Values/color_value/alpha) CSS function. This is a relative color function that can be used to modify just the alpha component of a given color.\n\n\n\n\n -\n\n\n\nFirefox now supports the `Promise.allKeyed` and `Promise.allSettledKeyed` methods from the await dictionary proposal, which take an object of promises and resolve to an object of results with the same keys.\n\n\n\n\n -\n\n\n\nFirefox now supports the WebAssembly Compact Import Section proposal, which can reduce the size of WebAssembly modules with many imports.\n\n\n\n\n -\n\n\n\nFirefox now supports the WebAssembly Wide Arithmetic proposal, which adds 128-bit arithmetic instructions for better performance in cryptography and arbitrary-precision math.\n\n\n\n\n -\n\n\n\nFirefox now supports QUIC version 2 ([RFC 9369](https://www.rfc-editor.org/rfc/rfc9369.html)) for HTTP/3 connections, and uses it when the server selects it through compatible version negotiation ([RFC 9368](https://www.rfc-editor.org/rfc/rfc9368.html)).\n\n\n\n\n -\n\n\n\nSupport for the non-standard `::-webkit-scrollbar` pseudo-element, added in Firefox 153, is now limited to a small list of sites rather than applying universally.\n\n\n\n\n -\n\n\n\nSVG `<a>` elements now expose the same [URL properties](https://developer.mozilla.org/docs/Web/API/HTMLAnchorElement#[REDACTED]) as HTML links, including `protocol`, `host`, `pathname`, and `search`.\n\n\n\n\n -\n\n\n\n`SVGGraphicsElement.getBBox()` now honors its [`options`](https://developer.mozilla.org/docs/Web/API/SVGGraphicsElement/getBBox#[REDACTED]) argument, so bounding boxes can include stroke, markers, and clipping.\n\n\n\n\n -\n\n\n\nThe `font-width` property is now supported as the standard name for `font-stretch`.\n\n\n\n\n -\n\n\n\nA dynamic `import()` that fails due to a network or HTTP error is no longer cached as a failure in the module map, so retrying the same specifier can now succeed.\n\n\n\n\n -\n\n\n\nWebTransport now supports send groups (`createSendGroup()`) for controlling how bandwidth is shared between streams, writable datagram streams (`createWritable()`), and `exportKeyingMaterial()` for deriving keys bound to the TLS session. It also adds a `draining` promise and subprotocol negotiation through the constructor's `protocols` option and the `protocol` property.\n\n\n\n\n -\n\n\n\nFirefox now supports `RTCError` for data channel failures, `RTCSctpTransport.maxChannels`, two-byte RTP header extension IDs, and more accurate `RTCTransportStats`, improving WebRTC interoperability.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Unresolved\n\n\n\n\n\n\n -\n\n\n\nFor users with vertical tabs enabled, the sidebar may not persist across Firefox restarts. Vertical tabs can be re-enabled after the restart by clicking the sidebar toolbar button. A fix is available in [Firefox 155.0.1](https://www.firefox.com/firefox/155.0.1/releasenotes/).\n\n\n\n\n -\n\n\n\nSome sites may load slowly or fail to load on networks that block UDP. This can affect e.g. corporate networks where a proxy or firewall blocks QUIC as part of TLS inspection. To work around it, set `network.http.happy_eyeballs_enabled` to `false` with the `Preferences` policy. A fix is available in [Firefox 155.0.1](https://www.firefox.com/firefox/155.0.1/releasenotes/). ([Bug 2063452](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n -\n\n\n\nStandard dynamic range (SDR) video in some formats can appear washed out on macOS. The issue is under investigation and a fix will ship in a future release. ([Bug 2068961](https://bugzilla.mozilla.org/show_bug.cgi?id=%5BREDACTED%5D))\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Community Contributions\n\n\n\n\n\n\n -\n\n\n\nWith the release of Firefox 155, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 20 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals, and take a look at their contributions:\n\n\n - Artem Bilous: [2056733](https://bugzilla.mozilla.org/2056733)\n - Cameron: [2052559](https://bugzilla.mozilla.org/2052559), [2052619](https://bugzilla.mozilla.org/2052619)\n - Colden Cullen: [2060708](https://bugzilla.mozilla.org/2060708)\n - Dan: [1735300](https://bugzilla.mozilla.org/1735300)\n - Fede: [1418178](https://bugzilla.mozilla.org/1418178), [2040498](https://bugzilla.mozilla.org/2040498), [2046774](https://bugzilla.mozilla.org/2046774)\n - Giulio B: [2048884](https://bugzilla.mozilla.org/2048884)\n - K: [1642578](https://bugzilla.mozilla.org/1642578)\n - Kevin Gosse: [2054036](https://bugzilla.mozilla.org/2054036)\n - Michael F: [2052438](https://bugzilla.mozilla.org/2052438)\n - mikey gough: [2053551](https://bugzilla.mozilla.org/2053551)\n - munawiki: [2055309](https://bugzilla.mozilla.org/2055309)\n - Nathan Leuz: [2053550](https://bugzilla.mozilla.org/2053550)\n - Nirmal Advani: [1804108](https://bugzilla.mozilla.org/1804108), [2003174](https://bugzilla.mozilla.org/2003174), [2003177](https://bugzilla.mozilla.org/2003177), [2003181](https://bugzilla.mozilla.org/2003181), [2031618](https://bugzilla.mozilla.org/2031618), [2033570](https://bugzilla.mozilla.org/2033570), [2046156](https://bugzilla.mozilla.org/2046156), [2052618](https://bugzilla.mozilla.org/2052618), [2053543](https://bugzilla.mozilla.org/2053543), [2053566](https://bugzilla.mozilla.org/2053566), [2053568](https://bugzilla.mozilla.org/2053568), [2053977](https://bugzilla.mozilla.org/2053977), [2058556](https://bugzilla.mozilla.org/2058556), [2059866](https://bugzilla.mozilla.org/2059866), [2060649](https://bugzilla.mozilla.org/2060649)\n - Priyanshu[:0xanshu]: [1977947](https://bugzilla.mozilla.org/1977947)\n - Richard Van Natta[:rnvannatta]: [2052617](https://bugzilla.mozilla.org/2052617)\n - Ruhollah Majdoddin: [1856645](https://bugzilla.mozilla.org/1856645), [2060029](https://bugzilla.mozilla.org/2060029), [2061166](https://bugzilla.mozilla.org/2061166), [2061348](https://bugzilla.mozilla.org/2061348)\n - Shawn Zivontsis: [2025999](https://bugzilla.mozilla.org/2025999)\n - Simon Rosen: [1875517](https://bugzilla.mozilla.org/1875517)\n - Yuxiao Zhu: [1861034](https://bugzilla.mozilla.org/1861034)\n - Zyphrenn: [2033961](https://bugzilla.mozilla.org/2033961), [2059969](https://bugzilla.mozilla.org/2059969)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n - [Previous Firefox 154.0](/en-US/firefox/154.0/releasenotes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Get the most recent version\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Android ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n- [iOS ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download Firefox ** ](/thanks/)\n - [** Download for Linux 64-bit ** ](/thanks/)\n - [** Download for Linux ARM64 ** ](/thanks/)\n - [** Firefox for Android ** ](https://play.google.com/store/apps/details?id=%5BREDACTED%5D&referrer=%5BREDACTED%5D)\n - [** Firefox for iOS ** ](https://apps.apple.com/us/app/apple-store/id989804926)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Need help or want to leave feedback?\n\n [File a bug](https://bugzilla.mozilla.org/enter_bug.cgi) [Leave feedback](https://connect.mozilla.org/)\n\n\n\n\n\n## Get Involved\n\n\n\nDid you know that most of the content in Firefox Support was written by volunteers?\n\n [Find out more](https://support.mozilla.org/get-involved)\n\n\n\n\n\n## Other Resources\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/155) [Complete list of changes for this release](https://bugzilla.mozilla.org/buglist.cgi?j_top=%5BREDACTED%5D&f1=%5BREDACTED%5D&o3=%5BREDACTED%5D&v3=%5BREDACTED%5D&o1=%5BREDACTED%5D&resolution=%5BREDACTED%5D&o2=%5BREDACTED%5D&query_format=%5BREDACTED%5D&f3=%5BREDACTED%5D&f2=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&v1=%5BREDACTED%5D&v2=%5BREDACTED%5D&limit=%5BREDACTED%5D) [Press Kit](https://blog.mozilla.org/press/kits/) [Mozilla and Firefox News](https://blog.mozilla.org) [Firefox Extended Support Release](/en-US/browsers/enterprise/) [All Firefox for Desktop Releases](/en-US/releases/) [Learn more about Firefox](/en-US/more/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n - [Website Privacy Notice](https://www.mozilla.org/en-US/privacy/websites/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Terms of Use](https://www.mozilla.org/about/legal/terms/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Cookie Policy](/en-US/privacy/websites/cookie-settings/)\n - [Community Participation Guidelines](https://www.mozilla.org/en-US/about/governance/policies/participation/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Logo Trademark Licensing](https://www.mozilla.org/foundation/trademarks/policy/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n## Help us improve your firefox.com experience\n\n\n\n\n\nIn addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy.\n\n\n\n Accept All Additional Cookies Reject All Additional Cookies\n\n\n\n[Cookie settings](/en-US/privacy/websites/cookie-settings/)",
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"content": "Firefox ESR 153.2.0, See All New Features, Updates and Fixes\n\n\n\n [](/en-US/)\n\n\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n Firefox for mobile\n\n\n\n  [Get Firefox on your phone](/en-US/mobile/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n Menu\n\n\n\n Menu\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Release Notes\n\n Menu **\n - [Desktop](/en-US/firefox/notes/)\n - [Desktop Beta & Developer Edition](/en-US/firefox/beta/notes/)\n - [Desktop Nightly](/en-US/firefox/nightly/notes/)\n - [Android](/en-US/firefox/android/notes/)\n - [iOS](/en-US/firefox/ios/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n# Firefox ESR\n Release Notes\n\n\n\nRelease Notes tell you what's new in Firefox. As always, we welcome your [feedback](https://connect.mozilla.org/). You can also [file a bug in Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi) or see the [system requirements](/en-US/firefox/153.2.0/system-requirements/) of this release.\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 64-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux ARM64 ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 32-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## 153.2.0 Firefox ESR\n\n\n\nSeptember 1, 2026\n\n\n\n\n\nVersion 153.2.0, first offered to ESR channel users on September 1, 2026\n\n\n\nFirefox 153 Extended Support Release (ESR) includes all of the enhancements since Firefox 140, along with many new features to make your enterprise deployments easier and even more flexible.\n\n\n\n\n\n\n\n\n - [Previous Firefox 140.0esr](/en-US/firefox/140.0esr/releasenotes/)\n\n\n\n\n\n\n\n\n\n\n\n### Fixed\n\n\n\n\n\n\n -\n\n\n\nVarious [security fixes](https://www.mozilla.org/security/advisories/mfsa2026-85/).\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Developer\n\n\n\n\n\n\n -\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/153)\n\n\n\n\n\n\n\n\n\n\n\n\n -\n\n\n\nReference link to [ESR 153.0 release notes](https://www.mozilla.org/firefox/153.0esr/releasenotes/).\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n - [Previous Firefox 140.0esr](/en-US/firefox/140.0esr/releasenotes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Get the most recent version\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 64-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux ARM64 ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 32-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Need help or want to leave feedback?\n\n [File a bug](https://bugzilla.mozilla.org/enter_bug.cgi) [Leave feedback](https://connect.mozilla.org/)\n\n\n\n\n\n## Get Involved\n\n\n\nDid you know that most of the content in Firefox Support was written by volunteers?\n\n [Find out more](https://support.mozilla.org/get-involved)\n\n\n\n\n\n## Other Resources\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/153) [Complete list of changes for this release](https://bugzilla.mozilla.org/buglist.cgi?j_top=%5BREDACTED%5D&f1=%5BREDACTED%5D&o3=%5BREDACTED%5D&v3=%5BREDACTED%5D&o1=%5BREDACTED%5D&resolution=%5BREDACTED%5D&o2=%5BREDACTED%5D&query_format=%5BREDACTED%5D&f3=%5BREDACTED%5D&f2=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&v1=%5BREDACTED%5D&v2=%5BREDACTED%5D&limit=%5BREDACTED%5D) [Press Kit](https://blog.mozilla.org/press/kits/) [Mozilla and Firefox News](https://blog.mozilla.org) [Firefox Extended Support Release](/en-US/browsers/enterprise/) [All Firefox for Desktop Releases](/en-US/releases/) [Learn more about Firefox](/en-US/more/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n - [Website Privacy Notice](https://www.mozilla.org/en-US/privacy/websites/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Terms of Use](https://www.mozilla.org/about/legal/terms/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Cookie Policy](/en-US/privacy/websites/cookie-settings/)\n - [Community Participation Guidelines](https://www.mozilla.org/en-US/about/governance/policies/participation/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Logo Trademark Licensing](https://www.mozilla.org/foundation/trademarks/policy/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n## Help us improve your firefox.com experience\n\n\n\n\n\nIn addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy.\n\n\n\n Accept All Additional Cookies Reject All Additional Cookies\n\n\n\n[Cookie settings](/en-US/privacy/websites/cookie-settings/)",
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"content": "Firefox ESR 140.15.0, See All New Features, Updates and Fixes\n\n\n\n [](/en-US/)\n\n\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Get Firefox](/thanks/)\n\n\n\n\n\n\n\n\n\n\n\n Firefox for mobile\n\n\n\n  [Get Firefox on your phone](/en-US/mobile/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n Menu\n\n\n\n Menu\n - Browser\n\n\n\n\n\n\n - [Mobile](/en-US/mobile/)\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n - [What’s New](/en-US/whatsnew/?from_main_nav=true)\n - [What’s Next](/en-US/whatsnext/)\n\n\n - [Extensions & Themes](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n [Download Firefox](/en-US/download/)\n\n\n\n\n\n\n - [Features](/en-US/features/)\n\n\n\n\n\n\n - [Protection](/en-US/features/protection/)\n - [Control](/en-US/features/control/)\n - [Focus](/en-US/features/focus/)\n - [About Firefox features](/en-US/features/)\n\n [View all Firefox Features](/en-US/features/all/)\n\n\n\n\n\n\n - Resources\n\n\n\n\n\n\n - [Data Protection](/en-US/user-privacy/)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n - [Podcast](https://www.youtube.com/@firefox/podcasts?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n - [Newsletter](/en-US/newsletter/)\n - [Release Notes](/en-US/firefox/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Release Notes\n\n Menu **\n - [Desktop](/en-US/firefox/notes/)\n - [Desktop Beta & Developer Edition](/en-US/firefox/beta/notes/)\n - [Desktop Nightly](/en-US/firefox/nightly/notes/)\n - [Android](/en-US/firefox/android/notes/)\n - [iOS](/en-US/firefox/ios/notes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n# Firefox ESR\n Release Notes\n\n\n\nRelease Notes tell you what's new in Firefox. As always, we welcome your [feedback](https://connect.mozilla.org/). You can also [file a bug in Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi) or see the [system requirements](/en-US/firefox/140.15.0/system-requirements/) of this release.\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 64-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux ARM64 ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 32-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## 140.15.0 Firefox ESR\n\n\n\nSeptember 1, 2026\n\n\n\n\n\nVersion 140.15.0, first offered to ESR channel users on September 1, 2026\n\n\n\nFirefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128, along with many new features to make your enterprise deployments easier and even more flexible.\n\n\n\n\n\n\n\n\n - [Previous Firefox 128.0esr](/en-US/firefox/128.0esr/releasenotes/)\n - [Next Firefox 153.0esr](/en-US/firefox/153.0esr/releasenotes/)\n\n\n\n\n\n\n\n\n\n\n\n### Fixed\n\n\n\n\n\n\n -\n\n\n\nVarious [security fixes](https://www.mozilla.org/security/advisories/mfsa2026-84/).\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n### Developer\n\n\n\n\n\n\n -\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/140)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n - [Previous Firefox 128.0esr](/en-US/firefox/128.0esr/releasenotes/)\n - [Next Firefox 153.0esr](/en-US/firefox/153.0esr/releasenotes/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Get the most recent version\n\n\n\n\n\n\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\nYour system may not meet the requirements for Firefox, but you can try one of these versions:\n\n\n\n\n\n Download Firefox — English (US)\n\n\n - [Windows 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 64-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Windows 32-bit MSI ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [macOS ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 64-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux ARM64/AArch64 ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n- [Linux 32-bit ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-windows-7-8-and-81-moving-extended-support) on Windows 8.1 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n\n\n [Download Firefox ESR 64-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n [Download Firefox ESR 32-bit](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Download a different build](/en-US/download/all/desktop-esr/)\n\n\n\n\n\n\n\n**Firefox is [no longer supported](https://support.mozilla.org/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support) on macOS 10.14 and below.**\n\n\n\nPlease download Firefox ESR (Extended Support Release) to use Firefox.\n\n\n\n [Download Firefox ESR](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n\n\n\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download Firefox ESR ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 64-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux ARM64 ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n - [** Download for Linux 32-bit ** ](https://download.mozilla.org/?product=%5BREDACTED%5D&os=%5BREDACTED%5D&lang=%5BREDACTED%5D)\n\n [Firefox Privacy Notice](https://www.mozilla.org/en-US/privacy/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_content=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Need help or want to leave feedback?\n\n [File a bug](https://bugzilla.mozilla.org/enter_bug.cgi) [Leave feedback](https://connect.mozilla.org/)\n\n\n\n\n\n## Get Involved\n\n\n\nDid you know that most of the content in Firefox Support was written by volunteers?\n\n [Find out more](https://support.mozilla.org/get-involved)\n\n\n\n\n\n## Other Resources\n\n [Developer Information](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/140) [Complete list of changes for this release](https://bugzilla.mozilla.org/buglist.cgi?j_top=%5BREDACTED%5D&f1=%5BREDACTED%5D&o3=%5BREDACTED%5D&v3=%5BREDACTED%5D&o1=%5BREDACTED%5D&resolution=%5BREDACTED%5D&o2=%5BREDACTED%5D&query_format=%5BREDACTED%5D&f3=%5BREDACTED%5D&f2=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&bug_status=%5BREDACTED%5D&v1=%5BREDACTED%5D&v2=%5BREDACTED%5D&limit=%5BREDACTED%5D) [Press Kit](https://blog.mozilla.org/press/kits/) [Mozilla and Firefox News](https://blog.mozilla.org) [Firefox Extended Support Release](/en-US/browsers/enterprise/) [All Firefox for Desktop Releases](/en-US/releases/) [Learn more about Firefox](/en-US/more/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Download\n\n\n - [Download Firefox](/thanks/)\n - [Windows](/en-US/download/windows/)\n - [macOS](/en-US/download/mac/)\n - [iOS](/en-US/download/ios/)\n - [Android](/en-US/download/android/)\n - [Linux](/en-US/download/linux/)\n - [Custom Download Options](/en-US/download/all/)\n\n\n\n\n\n\n\n## Resources\n\n\n - [Compare](/en-US/compare/)\n - [Release Notes](/en-US/firefox/notes/)\n - [Learn](/en-US/more/)\n - [Merch store](https://shop.mozilla.com/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Support](https://support.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Add-ons](https://addons.mozilla.org/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Community](https://community.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Blog](https://blog.mozilla.org/en/category/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Latest Builds\n\n\n - [Nightly](/en-US/channel/desktop/#nightly)\n - [Beta](/en-US/channel/desktop/#beta)\n\n\n\n\n\n\n\n## Firefox for Business\n\n\n - [Enterprise](/en-US/browsers/enterprise/)\n\n\n\n\n\n\n\n\n\n## Community\n\n\n - [Connect](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Contribute](https://www.mozilla.org/contribute/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Developer](/en-US/channel/desktop/developer/)\n\n\n\n\n\n\n\n## Follow Us\n\n\n - [Instagram](https://www.instagram.com/firefox/)\n - [YouTube](https://www.youtube.com/user/firefoxchannel)\n - [TikTok](https://www.tiktok.com/@firefox)\n - [Bluesky](https://bsky.app/profile/firefox.com)\n - [Podcast](https://www.youtube.com/@firefox/podcasts)\n\n\n\n\n\n\n\n [Language](/locales/) Language\n\n English (Canadian) English (British) English\n\n Go\n\n\n\n### [Powered by Mozilla](https://www.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n [Ask us a question!](https://connect.mozilla.org/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n\n - [Website Privacy Notice](https://www.mozilla.org/en-US/privacy/websites/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Terms of Use](https://www.mozilla.org/about/legal/terms/firefox/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Cookie Policy](/en-US/privacy/websites/cookie-settings/)\n - [Community Participation Guidelines](https://www.mozilla.org/en-US/about/governance/policies/participation/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n - [Logo Trademark Licensing](https://www.mozilla.org/foundation/trademarks/policy/?utm_source=%5BREDACTED%5D&utm_medium=%5BREDACTED%5D&utm_campaign=%5BREDACTED%5D)\n\n\n\n\n\n\n\n\n\n\n\n## Help us improve your firefox.com experience\n\n\n\n\n\nIn addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy.\n\n\n\n Accept All Additional Cookies Reject All Additional Cookies\n\n\n\n[Cookie settings](/en-US/privacy/websites/cookie-settings/)",
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"title": "Firefox ESR 140.15.0, See All New Features, Updates and Fixes",
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"message": "All four current releases shipped in the past 14 days:\n\n| Release | Channel | Date |\n|---|---|---|\n| [155.0.1](https://www.mozilla.org/en-US/firefox/155.0.1/releasenotes/) | Desktop release (latest) | Sep 4, 2026 |\n| [155.0](https://www.mozilla.org/en-US/firefox/155.0/releasenotes/) | Desktop release | Sep 1, 2026 |\n| [153.2.0 ESR](https://www.mozilla.org/en-US/firefox/153.2.0/releasenotes/) | ESR (current line) | Sep 1, 2026 |\n| [140.15.0 ESR](https://www.mozilla.org/en-US/firefox/140.15.0/releasenotes/) | ESR (legacy line, 153 is next) | Sep 1, 2026 |\n\nSecurity: 155.0 carries [MFSA 2026-82](https://www.mozilla.org/security/advisories/mfsa2026-82/). The two ESRs are security-only rollups: [MFSA 2026-85](https://www.mozilla.org/security/advisories/mfsa2026-85/) for 153.2.0 and [MFSA 2026-84](https://www.mozilla.org/security/advisories/mfsa2026-84/) for 140.15.0.\n\nCompatibility changes in 155 worth flagging:\n- Captive portal detection moved from detectportal.firefox.com to firefox-portal-detection.com, so network allowlists need updating.\n- CSS now caps nesting at 75 levels; more deeply nested rules no longer parse.\n- mailto: links open only on an explicit user action.\n- `::-webkit-scrollbar` support is narrowed to a small list of sites.\n- QUIC v2 for HTTP/3 is enabled; 155.0 had sites failing on networks that block UDP, fixed in 155.0.1 along with the vertical-tabs sidebar not persisting. Still unresolved: washed-out SDR video on macOS."
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}| Release | Channel | Date |
|---|---|---|
| 155.0.1 | Desktop release (latest) | Sep 4, 2026 |
| 155.0 | Desktop release | Sep 1, 2026 |
| 153.2.0 ESR | ESR (current line) | Sep 1, 2026 |
| 140.15.0 ESR | ESR (legacy line, 153 is next) | Sep 1, 2026 |
### Current Firefox releases · Mozilla.org | Release | Channel | Date | |---|---|---| | [155.0.1](https://www.mozilla.org/en-US/firefox/155.0.1/releasenotes/) | Desktop release (latest) | Sep 4, 2026 | | [155.0](https://www.mozilla.org/en-US/firefox/155.0/releasenotes/) | Desktop release | Sep 1, 2026 | | [153.2.0 ESR](https://www.mozilla.org/en-US/firefox/153.2.0/releasenotes/) | ESR (current line) | Sep 1, 2026 | | [140.15.0 ESR](https://www.mozilla.org/en-US/firefox/140.15.0/releasenotes/) | ESR (legacy line, 153 is next) | Sep 1, 2026 |