Name: Mozilla Firefox (it)
Author: Mozilla

Mozilla Firefox (it)

Mozilla·Mozilla.Firefox.it

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.it --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: `nullsoft`

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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

Older versions (61)

155.0.1

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155.0

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154.0.1

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154.0

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153.0.4

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153.0.3

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153.0.1

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153.0

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152.0.6

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152.0.5

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152.0.4

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152.0.3

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152.0.2

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152.0.1

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152.0

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151.0.4

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151.0.3

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151.0.2

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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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150.0

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149.0.2

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149.0

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148.0.2

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148.0

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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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147.0

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146.0.1

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146.0

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145.0.2

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145.0.1

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145.0

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144.0.2

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144.0

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143.0.4

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143.0.3

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143.0.1

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143.0

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142.0.1

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142.0

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141.0.3

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141.0.2

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141.0

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140.0.4

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140.0.2

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140.0.1

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arm64—B36FD95962E2DBC74B5240377BCB7BBEF5FF0EED0B97009B878F37FD46A899E7

140.0

x86—708A142BAA8E071650B9B9C3673A0BDA7E24549E469752E81231D6260F268F23

x64—A59EEC0766FD9EF0511B2797B1E1CEA96A7935C4CB345AB4D3843AF5827CF47E

arm64—2A75CCB0204C43617D140D83FFB201E008C3F03E48443CE2C0176507017EAE9B

139.0.4

x86—A5ED785157985E04C60548BAAA679BF3ECF9039536194EEE379009ECB91E3555

x64—1395E3AA1AD7CFB9FBFCF690A1ABE86E2BF567DB6E5B4EC8C99673A3F8D680F7

arm64—75BEC7540027BEA7C541804084019D2B5619C0111F67325B086445727133D262

139.0.1

x86—5825366419BB1D915FD784AB3BEB2DABA3C2987BBF219364DA67CEBF9B4FA4F2

x64—FC8C2B928ACE4D0325FADEE41B412E248F4D9126724F2B44C08FA8B189950ED8

arm64—81EF5602B49CF7CFCBB5F8BA3F8A06181A8A32427494E5356B801540292137B4

139.0

x86—571F2D2939AE1356CFA85426350ED1FE438E68A91132F981D8FD03A6598EC26E

x64—4CC2F7A47819DDAEEB003D9D25C234E1D91EACF6BE38E8B810F11214A59D1DB3

arm64—9DFC2B261921D44C5BAB873000A4D3F20038E75B537D3E883BF6D666B263C43D

138.0.4

x86—5B7EFA4A811157C59CA6CC2186DDB9D2F82622F66F4B4E0219E0AC9BDD47D907

x64—D2C4A0EFB0F2952DB445C5F72EAEE5257CAA4A0B1A9E29E41C594BFE19236069

arm64—CC58E69C8AD18FDAD8BEE8320D5187F7D81856123AF35C57571262051EB353BA

138.0.3

x86—F5EE00A60E52BDE8A0150C7987C60EF27738E6F7780E475FC8B74FBAFC2F1BFD

x64—639897F1F2B0230B6B5193DDD3E747938A5A83DCBAA01A06D356692AFF471D4A

arm64—623103B6D8302A7457658E4C93319B58F6EF1FA598D15DD3EC43EA298172A89C

138.0.1

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x64—7D4C8109EBACFA996DB44AB014EBED491FFEB46DECD0FA47B7A9EE286C21F9E8

arm64—AD4DBCC11D81B0B95E19276621A8FECFA67FA2DCBB522603414AFD44229F7094

138.0

x86—790660ADFDAF7EAC5E674870B2C773642F534551771015364DB9D49CB23167B7

x64—C99463FF38D3FFCD9CFAB944178A6FFC2F47DD7F770428FC7AF156C5ED5EF040

arm64—1E5B6860540D812621454149BF6D419373B40A01CD97936F0B0704041250B63F

137.0.2

x86—64D6D7B95BF2BD53BAC72619F22F83BD61F2A780FB2DE32FA94CA47DE3086042

x64—63B69409AF425EA2FF86EB5729D912C53B4ECA5DBA86AEF37B1557F06AB3F86B

arm64—9024EFC1FE716500CB525506D28769A1F500E2BFEEF9F2E4C23717E193EFFE71

Mozilla Firefox (it)

Latest 156.0·September 15, 2026

Installer type: nullsoft

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Installer type: `nullsoft`