Mozilla Firefox Updates

Fixed an issue causing breakage on sites using Three.js.

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Fixed a startup crash affecting Windows users with Avast

Focus on just one tab in a group without the clutter

improved Firefox' connection fallback behavior

Fixed an issue that prevented some extensions from updating via the Add-ons Manager.

Version 143.0.1, first offered to Release channel users on September 19, 2025

Firefox now supports running websites as web apps pinned directly to the taskbar.

Fixed a crash in KDE Plasma when using certain custom window decorations.

You can now see what’s behind a link before visiting it with Link Previews

Fixed an issue where cryptominers were not listed as blocked in Strict Tracking Protection

Fixed a startup crash experienced by some Linux users with outdated NVIDIA drivers.

A local AI model identifies similar tabs, automatically organizes them into groups,

Various security fixes

Firefox's QUIC stack is moving to a Rust based UDP I/O stack that leverages

Fixed a startup crash on Windows experienced by some users

Fixed text contrast issues in the sidebar with some dark themes

You can now keep more — or fewer — pinned tabs

Fixed Firefox freezing when switching between apps or opening certain panels

Mitigated a recently-disclosed privacy leak.

Fixed the "Translate page" menu option sometimes not consistently appearing

Fixed graphics corruption with certain NVIDIA graphics adapters

Full-Page Translations are now available

Security fixes

Fixed an issue where the browser could repeatedly crash when certain SVG

Fixed an issue which caused a blank page to be shown for Home and New Tab

Users in the United States can now trigger weather suggestions in the address bar

Fixed file picker not being displayed when exporting passwords on macOS

Fixed a crash experienced by Windows users when downloading files