August 19, 20251 yr Mozilla has published the final builds of the Firefox 155 open-source web browser today, ahead of its official unveiling on September 1st, 2026, so it’s time to take a look at the new features and improvements.Highlights of Firefox 155 include support for Happy Eyeballs v3 for faster page loading, the ability to reorder containers in Settings, support for Nintendo Switch Pro and compatible aftermarket controllers on Windows, and support for showing how many trackers it has blocked in the address bar.Firefox 155 also adds support for limiting CSS to 75 levels of nested blocks and functions to prevent crashes caused by extremely deep nesting, using firefox-portal-detection.com instead of detectportal.firefox.com to detect captive portals and check network connectivity, and opening mailto: links only in response to an explicit user action.On top of that, it adds support for enlarging PDFs that are smaller than the paper size to fill the sheet when printing by setting the scale above 100%, and implements the DisableLaunchOnLogin enterprise policy to control whether Firefox launches automatically when users log in to Windows.For Android users, Firefox 155 adds support for an Edit shortcut option that goes straight to its settings when long-pressing a toolbar shortcut, support for dismissing autofill prompts when focus moves away, and support for loading tabs opened by extensions during private browsing in private browsing.For web developers, Firefox 155 improves the Rules View with toggles to emulate the prefers-reduced-motion media feature, improves the JSON Viewer to display JSON Lines (JSONL/NDJSON) documents, and adds a keyboard shortcut to enable or disable all breakpoints at once in the Debugger.Moreover, it adds support for the progress() CSS function, support for SVG < a > elements to expose the same URL properties as HTML links, support for the alpha() CSS function, support for any value type to the CSS attr() function, support for the Promise.allKeyed and Promise.allSettledKeyed methods, and support for QUIC v2 for HTTP/3 connections.Also for developers, Firefox 155 adds support for the WebAssembly Compact Import Section proposal, which can reduce the size of WebAssembly modules with many imports, support for the non-standard ::-webkit-scrollbar pseudo-element, support for the font-width property as the standard name for font-stretch, and improved WebRTC interoperability.Of course, there are also many bug fixes in Firefox 155, the most notable ones being a fix for an issue that prevented Linux systems from going to sleep after a long browsing session and a fix for disappearing text in MS 365 Word Online and other web apps on Linux when typing with certain keyboard layouts.https://youtu.be/GIWKzkn0zrsSilent installationArabicAIO Silenthttps://www.mediafire.com/file/wchtl5jsb74sima/Mozilla+Firefox+155.0+Ar.7z/filehttps://transfer.it/t/ocVCZygnxRSYEnglishAIO Silenthttps://www.mediafire.com/file/nr5f6nnwxfeobjo/Mozilla+Firefox+155.0+En.7z/filehttps://transfer.it/t/6ufvtv5DlLjK FrenchAIO Silent https://www.mediafire.com/file/hcrydkydnanm3oq/Mozilla+Firefox+155.0+Fr.7z/filehttps://transfer.it/t/smBoI6ozibLYMozilla Firefox 115.0.3 (Last version support Windows 7)ArabicAIO Silenthttps://www.mediafire.com/file/4aov9jd1s57cskj/Mozilla.Firefox.115.0.3.ar.AIO.Install.Silent.7z/fileEnglishAIO Silenthttps://www.mediafire.com/file/jzjws6mtjkw4yvh/Mozilla.Firefox.115.0.3.en.AIO.Install.Silent.7z/file Edited 1 hour ago1 hr by T3rM1nat0Rr3
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September 30, 2025Sep 30 Author https://www.firefox.com/en-US/firefox/143.0.3/releasenotes/?redirect_source=mozilla-org
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