Mozilla Firefox 161 enters public beta with new features

Mozilla has released Firefox 161 for public beta testing, allowing users and developers to evaluate upcoming features before the stable release. The beta follows the recent Firefox 160 stable release, which introduced Mini Window, MathML support in PDFs, and Picture-in-Picture playback speed controls.

The Firefox 161 beta continues Mozilla's regular release cadence for its open-source web browser. Users can download beta builds to test new functionality and report issues prior to the stable channel promotion. The release maintains Firefox's cross-platform support for Linux, Windows, and macOS systems.

What to expect in Firefox 161 beta

• Release stage: Firefox 161 is currently in public beta testing, not yet promoted to the stable release channel.
• Preceding release: Firefox 160 stable recently shipped with Mini Window functionality, MathML content rendering in PDF documents, and Picture-in-Picture playback speed settings.
• Testing purpose: The beta period allows community validation of new features and bug identification before stable deployment.
• Open-source model: Firefox remains developed under Mozilla's open-source license with public beta access for community participation.

Why it matters

Firefox's continued regular release cycle provides Linux distributions with a predictable update schedule for their default or alternative browser packages. The public beta program enables downstream maintainers and enterprise administrators to validate compatibility before stable channel adoption, reducing deployment risks for organizations standardizing on the open-source browser.