Name: Mozilla Firefox (pt-PT)
Author: Mozilla

Mozilla Firefox (pt-PT)

Mozilla·Mozilla.Firefox.pt-PT

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.pt-PT --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

x86—2697C6339DE2F22ADAFBD256010F2728B793C90E3C35E5571AA7C8588D7391BD

x64—8F7B1F5160D15A9FCF66BAC3A719135286C644BE680C9C6270751CD2CB160736

arm64—2459018AFDB4B3552B7BE2E35735CEA7CA9A2E88EACEE59D1515776110A18798

140.0

x86—D06C2D5BCFA357BCE69F75EF4B324F05A46272B87C8F9D6558DF9ADD3B785A42

x64—AF723503FF9A229602BE7333E8A765E48DF17473EBB160B3924B89EB96766E87

arm64—B3EF3444E584DADE9A400524BBDA5215E095653009972151C1A43237317F6337

139.0.4

x86—26B0C42CE9224FFA1DFC2A78BB50D68E1E8290E862A343A9CCA431AAD8173CA3

x64—1967DFFF4CD78D1255F800FFD8BBB1C441D6106A4EB7AEFED4E9DF2B6664C31D

arm64—D50794A8C3AE69DA8F9252B8D1D62EE4087FDFD8F11E786DB292159C87C0BC5B

139.0.1

x86—9333C6FE1C28C9865265C5E2095264C3E8283D157EA39C40420640A5074836D0

x64—BFC9FC9AD06495D02A0F80BC3B4EC0B600E096FD523FEDF51B2E0D28D0AF03B9

arm64—9ED9BB385D84736F5A974D0804BCA24A894459C6E2A3757B61EAE5EFC56F888E

139.0

x86—D280425A911329BE4F5CBF7913A3909EBBA1E1CD380F5B695403B355C38558C2

x64—BCC8C09BA4EA9C7D03AD29091B32BCABFE00154BDFF4E7012D352D8EA171A7B8

arm64—796B50503BB285E071380D4C0159AF0469F0B6BAC171CE349FEF9F08071FD77D

138.0.4

x86—8A8479A2EE129C78991EE28F370AB16974D8811BC1A1DE2D347B6915E2B559E3

x64—12D3279ABAB5700EBBAFE91F0FDF425A9F803334BE4D87AF318F05F96453AFDF

arm64—8C8FABE99DA8C6759A95BBDBF6AC3E2CF66ECB778EE116E63E9107F1CF8B9796

138.0.3

x86—3834CAF624175D3FCCE8F11FEED54084D6C431DB19426BB37D5349CD92CBC140

x64—EA45C3161DBD361E998632D0B2CF2518089E0955263A058B272AF2ACBF6958C4

arm64—F848C2A3851940700BF17F7C4DA84EB8E7A355B23C6181484B8752ECEB9CF306

138.0.1

x86—AB76028ACF9C502D40C748C287D72C4323E302ACDB8260B787A7D33DF9A4CAC4

x64—3D2A9FBF4389EA540AF68DB7D0074454E300FBC88D4BEB214906DFF568B1527B

arm64—7289698A2DBBB9D4CC32CDF779337BED7E6232139D57AE0A0F4E8E83F6F19CBE

138.0

x86—D68E400CF33E2510D2405557EA5ACB9D9F86876CE7B6E929FF431E73F8E8AF60

x64—23DEB8FBAB9C39CD5F5A866461F53F4AA65E1DEEE44CD3D9984D85C13758D0AA

arm64—E43F729C71297ED2E6DB5A197A00DCAE46A1E6DA94C06F9CA0BBE23852670706

137.0.2

x86—025A0FF52EDD4167DAE2E2067148FF4C8A33F445517A332689882FA3B7568008

x64—F6DC7656B23838245578CDC18EE27ACC06E641BE607D8F62F908B9213B1229C5

arm64—87895265CA144AA6867E2CC79E721C5924392B09A05EEDD95AC677CDBC997951

Mozilla Firefox (pt-PT)

Latest 156.0·September 15, 2026

Installer type: nullsoft

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Installer type: `nullsoft`