Overview
- Mozilla rolled out Firefox 157 on Tuesday, Sept. 29, 2026, delivering the redesigned browser to users on both desktop and mobile.
- The update refreshes colours, icons, tabs, toolbars, the New Tab page and Private Browsing to a single, shared design language across platforms.
- Compact Mode has returned as a condensed option that shrinks tab and toolbar size and includes an auto-compact setting for smaller screens.
- Firefox 157 adds a theme picker, new themes and wallpapers, and the ability to pin shortcuts on the New Tab page so users can personalize their home screen.
- Mozilla says the redesign comes with no cost to browser performance, reporters note the rounder visuals make Firefox resemble Chrome more, and the company refined the changes in Nightly using months of user feedback to prepare for future feature work.