Firefox 141 adds AI tab grouping, unit conversion in address bar, and Linux memory gains

Mozilla has released Firefox 141, delivering a mix of productivity, performance, and platform improvements to this popular web browser. One of the highlights is a new on-device AI model that automatically organizes similar tabs into groups and even suggests names, all locally to ensure privacy.

Building on browser utility, users can now perform unit conversions directly in the address bar. Supported units include length, temperature, mass, force, angular measurement, and timezones. For those using vertical tabs, the sidebar's tool areas can now be resized for greater customization.

Linux users benefit from Firefox’s reduced memory consumption, and updates installed via package managers now take effect without requiring a forced restart. While these features target Linux specifically, address autofill has been expanded for users in Brazil, Spain, and Japan, streamlining online form completion.

On Android, Firefox 141 introduces auto-locking private tabs, which can be unlocked using biometric authentication or a PIN, plus a redesigned menu, improved URL bar, and the ability to share PDFs. On iOS, this update brings a refreshed homepage, a revamped tab tray and toolbar, and notable performance improvements.