Tuesday, 22 September 2026 @ 02:02 UTC~2214,580172,138

Mozilla Firefox (MSIX)

Mozilla·Mozilla.Firefox.MSIX

Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.

Firefox Browser, also known as Mozilla Firefox or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards. In 2017, Firefox began incorporating new technology under the code name Quantum to promote parallelism and a more intuitive user interface. Firefox is officially available for Windows 7 or newer, macOS, and Linux. Its unofficial ports are available for various Unix and Unix-like operating systems including FreeBSD, OpenBSD, NetBSD, illumos, and Solaris Unix.

winget install --id Mozilla.Firefox.MSIX --exact --source winget

Latest 156.0·September 15, 2026

Release Notes

Version 156.0, first offered to Release channel users on September 15, 2026

New

  • Firefox on macOS can now be set to open automatically when the computer starts up, from the Startup section of Settings.
  • Localized Wikipedia and occasional sponsored suggestions in the address bar are now available in France, Germany, and Italy. These suggestions can be turned off in Firefox Suggest settings.

Fixed

  • Fixed an issue where dragging an image to a new position in a rich-text editor could replace it with a long line of text instead of moving it.
  • Fixed high-sample-rate FLAC audio in MP4 failing to play on sites such as Bilibili.
  • Fixed subtitles not appearing in the Picture-in-Picture window when they are turned on in the video player after the window has already opened.
  • Fixed bookmarks moving out of their folder when the folder and the bookmarks inside it were selected and dragged together in the Bookmarks sidebar.
  • Fixed the find bar becoming permanently unavailable in a tab after reversing the panes in Split View.
  • Fixed some sites failing to load when DNS over HTTPS is enabled and the site does not support HTTPS.
  • Fixed Firefox losing all network connectivity for some users with the built-in VPN enabled.
  • Fixed an issue on Windows where Firefox could block an auto-hiding taskbar from showing.
  • Various security fixes.

Changed

  • Firefox's built-in PDF viewer now starts up to 45% faster.
  • Improved memory and CPU usage when Firefox displays large JPEG images scaled down to fit a page.
  • On Windows devices with ARM64 processors, WebRTC video calls may now use hardware H264 decoding instead of falling back to software.

Enterprise

  • You can find information about policy updates and enterprise-specific bug fixes in the Firefox for Enterprise 156 Release Notes.

Developer

Web Platform

  • text-box-trim now uses the font metrics of a ::first-line pseudo-element when one applies, matching other browsers and the specification.

Community Contributions

  • With the release of Firefox 156, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 10 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:
    • Aaron Ma: 2063818
    • Dominik Bay [:eimann]: 2066736
    • ExplodingJoysticks: 1728637, 1890400, 1910664, 1928343, 1944206, 2000658, 2003000, 2059911, 2061541
    • Gopalarathnam Venkatesan: 2003172, 2042426, 2062096, 2062952, 2062989
    • Hugo Osvaldo Barrera: 2063808
    • Kana: 2062133
    • Kerissa Grubb: 2042422
    • Louis-Philippe Manette: 2062972, 2063867
    • Seunghyun An: 2063033
    • William McDonald: 1034964

Installer type: msix

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x64—8D6E672CEDC4A619A73B218A0AE74683D75E30740A787C6A6ED75482F6474CBA
arm64—7BD3AED073DFEB97E73FFBEA1EFC64F1692A186B9C937F66A12D4354570907DF

Details

Homepage
https://www.mozilla.org/firefox/
License
MPL-2.0
Publisher
Mozilla
Support
https://support.mozilla.org/
Privacy Policy
https://www.mozilla.org/privacy/firefox/
Copyright
© Firefox and Mozilla Developers; available under the MPL 2 license.
Moniker
firefox

Tags

9nzvdkpmr9rdbrowsergeckointernetpdfreaderquantumspidermonkeywebweb-browserwebpageswebsites

Older versions (59)

155.0.1
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154.0.1
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154.0
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152.0.2
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152.0.1
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152.0
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151.0.1
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151.0
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150.0.3
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150.0.2
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150.0.1
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149.0.2
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149.0
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148.0.2
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147.0.4
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147.0.3
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147.0.2
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147.0.1
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146.0.1
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x64—71B63C9C24CEE25E51C1C30F5ACE674491B5254104EB122B40CD77C21C4F3758
138.0.4
x86—205FD7F78B15B8BECF47456D4827DF75F4774E93DEEB3BF16CAD16818A653575
x64—4DB1D1E0895114B7BA76E20925922C60D2F55CDA06A07041534D42D6B977C488
138.0.3
x86—8C69FAECBF3493C65188A5266E72C4F45949B5186A5F154D0E0E0F5E39DD9DC5
x64—20544B5B2C1CAC3787D1F6F9179F01E0F6A37408978227A6FA1BEFE6F88B0C4D
138.0.1
x86—C4762FFF38D44EF046D20FFF8EC7758F384531A0456B0C86FB9DB2111DDB5338
x64—A84D5DC67110E2989A783F886CCF1CC0D75CECEB0B6B68D2A9FC824099EE8984
138.0
x86—8CA166E2E31C9656093EAD05FA7AC9EBDFD2EB981922353412D0D681573D4D42
x64—771003FDF337186CD7E6BC9831DF8F2A5D9C94245A115AE0C071BD6F3E30505A
137.0.2
x86—A829FEEF3033A31052552F87F433AE16E8AA3E863059915F3309B03A06842BFC
x64—1108910486E5EED7792BEA6059CFEBCE73424C25ED1711C3A114A7E9E0FDD5CE