Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox for Android
Release Notes

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

Version 147.0, first offered to Release channel users on January 13, 2026

Thanks for using Firefox! Have feedback or suggestions? We'd love to hear from you at Android Support

Safer browsing: Added protection against side-channel attacks such as Spectre using the same Site Isolation safeguards already in use by desktop Firefox.

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