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Every changelog, explained.
Browse all Firefox release notes. All information is sourced from official Mozilla documentation.
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32 versions available
- Nightly153.0a1
Firefox Nightly 153.0a1
Starting with Firefox 152, Nightly builds have an in-memory cache for the JavaScript compilation result, which is shared across navigation within the same do…
New(6)Changed(3)Developer(2)Web Platform(9)20changes across 4categories Read more → - Beta152.0b5
Firefox 152.0 Beta
Improved support for more advanced cursor movement commands, including those relating to paragraph boundaries, on macOS.
New(7)Fixed(5)Changed(3)Developer(2)Web Platform(5)22changes across 5categories Read more → - Stable151.0May 19, 2026
Firefox 151.0
Firefox Home (New Tab) has a fresh, new look and feel. The layout and design will enable upcoming features, from widgets to shortcuts improvements, launching…
New(10)Fixed(4)Changed(3)Enterprise(1)Developer(1)Web Platform(11)Community Contributions(1)31changes across 7categories Read more → - Stable150.0Apr 21, 2026
Firefox 150.0
Split View just got better: You can now right-click any link and choose Open Link in Split View to open it alongside your current tab. You can also search op…
New(11)Fixed(2)Changed(1)Enterprise(1)Developer(4)Web Platform(6)Unresolved(2)Community Contributions(1)28changes across 8categories Read more → - Stable149.0Mar 24, 2026
Firefox 149.0
View two pages side-by-side in a single window with the new Split View feature that makes it easier to compare information, research topics or work across tw…
New(7)Firefox Labs(1)Fixed(2)Changed(5)Developer(3)Web Platform(8)Community Contributions(1)27changes across 7categories Read more → - Stable148.0Feb 24, 2026
Firefox 148.0
Added an AI Controls section to Settings for managing AI-enhanced features. Learn more .
New(6)Fixed(3)Developer(1)Web Platform(9)Community Contributions(1)20changes across 5categories Read more → - Stable147.0Jan 13, 2026
Firefox 147.0
Address autofill has been enabled for users in Switzerland.
New(8)Fixed(5)Changed(1)Enterprise(1)Developer(5)Web Platform(11)Community Contributions(1)32changes across 7categories Read more → - Stable146.0Dec 9, 2025
Firefox 146.0
Windows 10 users can now automatically protect their passwords, bookmarks, and more by turning on backup in Firefox. Your browsing data is saved daily on you…
New(7)Fixed(2)Changed(2)Enterprise(1)Developer(5)Web Platform(4)Unresolved(1)Community Contributions(1)23changes across 8categories Read more → - Stable145.0Nov 11, 2025
Firefox 145.0
Add, edit, and delete comments to make your own notes in PDFs (summaries, questions, tasks, etc.). The comment sidebar helps you scan all your comments and q…
New(10)Fixed(1)Changed(5)Enterprise(1)Developer(2)Web Platform(5)Unresolved(1)Community Contributions(1)26changes across 8categories Read more → - Stable144.0Oct 14, 2025
Firefox 144.0
Focus on just one tab in a group without the clutter. Your active tab now stays in view, keeping things tidy even with the group collapsed.
New(8)Fixed(2)Changed(1)Enterprise(1)Developer(3)Web Platform(13)Community Contributions(1)29changes across 7categories Read more → - Stable143.0Sep 16, 2025
Firefox 143.0
On Windows, Firefox now supports running websites as web apps pinned directly to the taskbar. These are sites that you can pin and run as simplified windows …
New(8)Fixed(1)Enterprise(1)Developer(4)Web Platform(4)Community Contributions(1)19changes across 6categories Read more → - Stable142.0Aug 19, 2025
Firefox 142.0
For users in the United States, article recommendations on your New Tab page are now grouped into topic sections like Sports, Food, and Entertainment to make…
New(6)Fixed(3)Changed(2)Enterprise(1)Developer(6)Unresolved(1)Community Contributions(1)20changes across 7categories Read more → - Stable141.0Jul 22, 2025
Firefox 141.0
Now Firefox can help you keep your tabs organized, automatically. A local AI model identifies similar tabs, automatically organizes them into groups, and eve…
New(7)Fixed(1)Changed(1)Enterprise(1)Developer(3)Web Platform(4)Community Contributions(1)18changes across 7categories Read more → - Stable140.0Jun 24, 2025
Firefox 140.0
Vertical Tabs: You can now keep more — or fewer — pinned tabs in view for quicker access to important windows. Just drag the divider to resize your pinned ta…
New(7)Fixed(1)Changed(1)Enterprise(1)Developer(2)Web Platform(7)Unresolved(1)Community Contributions(1)21changes across 8categories Read more → - Stable139.0May 27, 2025
Firefox 139.0
By popular request, Full-Page Translations are now available within Firefox extension pages that start with the moz-extension:// URL scheme.
New(4)Fixed(3)Changed(2)Enterprise(1)Developer(4)Web Platform(8)Unresolved(1)Community Contributions(1)24changes across 8categories Read more → - Stable138.0Apr 29, 2025
Firefox 138.0
Profile management helps protect your privacy and stay focused by separating your online life into distinct profiles — for work, school, vacation planning, o…
New(5)Fixed(1)Changed(2)Enterprise(1)Developer(6)Web Platform(3)Unresolved(1)Community Contributions(1)20changes across 8categories Read more → - Stable137.0Apr 1, 2025
Firefox 137.0
Tab groups begin rolling out today! Stay productive and organized with less effort by grouping related tabs together. One simple way to create a group is to …
New(6)Fixed(1)Enterprise(1)Developer(3)Web Platform(2)Unresolved(2)Community Contributions(1)16changes across 7categories Read more → - Stable136.0Mar 4, 2025
Firefox 136.0
You can now enable the updated Firefox sidebar in Settings > General > Browser Layout to quickly access multiple tools in one click, without leaving your mai…
New(11)Fixed(2)Changed(3)Enterprise(1)Developer(2)Web Platform(10)Unresolved(1)Community Contributions(1)31changes across 8categories Read more → - Stable135.0Feb 4, 2025
Firefox 135.0
Firefox Translations now supports more languages than ever! Pages in Simplified Chinese , Japanese , and Korean can now be translated and Russian is now avai…
New(7)Fixed(2)Changed(4)Developer(4)Web Platform(4)Community Contributions(1)22changes across 6categories Read more → - Stable134.0Jan 7, 2025
Firefox 134.0
Firefox now supports touchpad hold gestures on Linux. This means that kinetic (momentum) scrolling can now be interrupted by placing two fingers on the touch…
New(3)Fixed(1)Changed(2)Developer(4)Community Contributions(1)11changes across 5categories Read more → - Stable133.0Nov 26, 2024
Firefox 133.0
Firefox now has a new anti-tracking feature, Bounce Tracking Protection, which is now available in Enhanced Tracking Protection's "Strict" mode. This feature…
New(3)Fixed(2)Changed(1)Enterprise(1)Developer(6)Community Contributions(1)14changes across 6categories Read more → - Stable132.0Oct 29, 2024
Firefox 132.0
Microsoft PlayReady encrypted media playback is now being rolled out to select sites on Windows. Through this support, we are gradually rolling out a 1080p b…
New(6)Fixed(1)Changed(2)Enterprise(1)Developer(4)Web Platform(7)Community Contributions(1)22changes across 7categories Read more → - Stable131.0Oct 1, 2024
Firefox 131.0
Firefox will now offer to temporarily remember when users grant permissions to sites (e.g. geolocation). Temporary permissions will be removed either after o…
New(4)Fixed(1)Changed(1)Enterprise(1)Developer(4)Web Platform(2)Unresolved(3)Community Contributions(1)17changes across 8categories Read more → - Stable130.0Sep 3, 2024
Firefox 130.0
Firefox now allows translating selected text portions to different languages after a full-page translation.
New(4)Fixed(2)Changed(1)Enterprise(1)Developer(1)Web Platform(2)Community Contributions(1)12changes across 7categories Read more → - Stable129.0Aug 6, 2024
Firefox 129.0
Reader View now has an enhanced Text and Layout menu with new options for character spacing, word spacing, and text alignment. These changes offer a more acc…
New(7)Fixed(1)Enterprise(1)Developer(5)Web Platform(6)Unresolved(1)Community Contributions(1)22changes across 7categories Read more → - Stable128.0Jul 9, 2024
Firefox 128.0
Firefox can now translate selections of text and hyperlinked text to other languages from the context menu.
New(7)Fixed(2)Changed(2)Enterprise(1)Developer(4)Web Platform(6)Community Contributions(1)23changes across 7categories Read more → - Stable127.0Jun 11, 2024
Firefox 127.0
You can now set Firefox to automatically launch whenever you start or restart your Windows computer. Setting Firefox to auto-launch optimizes efficiency in o…
New(5)Fixed(1)Changed(3)Enterprise(1)Developer(1)Web Platform(1)Unresolved(3)Community Contributions(1)16changes across 8categories Read more → - Stable126.0May 14, 2024
Firefox 126.0
The Copy Without Site Tracking option can now remove parameters from nested URLs. It also includes expanded support for blocking over 300 tracking parameters…
New(7)Fixed(1)Changed(1)Enterprise(1)Developer(2)Web Platform(5)Unresolved(1)Community Contributions(1)19changes across 8categories Read more → - Stable124.0Mar 19, 2024
Firefox 124.0
Caret browsing mode now also works in the PDF viewer. ( Learn more )
New(5)Fixed(1)Enterprise(1)Developer(1)Web Platform(2)Community Contributions(1)11changes across 6categories Read more → - Stable123.0Feb 20, 2024
Firefox 123.0
We’ve integrated search into Firefox View. You can now search through all of the tabs on each of the section subpages - Recent Browsing, Open Tabs, Recently …
New(2)Fixed(2)Changed(3)Enterprise(1)Developer(2)Web Platform(5)Unresolved(1)Community Contributions(1)17changes across 8categories Read more → - Stable122.0Jan 23, 2024
Firefox 122.0
Firefox now displays images and descriptions for search suggestions when provided by the search engine.
New(6)Fixed(1)Enterprise(1)Developer(2)Web Platform(11)Unresolved(1)Community Contributions(1)23changes across 7categories Read more → - Stable121.0Dec 19, 2023
Firefox 121.0
Firefox now prompts Windows users to install the Microsoft AV1 Video Extension to enable hardware decoding support for the AV1 video codec from about:support…
New(5)Fixed(2)Enterprise(1)Developer(3)Web Platform(5)Community Contributions(1)17changes across 6categories Read more →
Nightly
Beta