🌐 Mozilla is testing a redesigned Firefox interface in nightly builds as part of its Nova project. The update rounds tab buttons and the address bar, and it groups the tab strip, navigation bar, and sidebar inside a separate colored area. Firefox also adds dedicated toolbar buttons for private browsing and the built in VPN.

The redesign makes it easier to use tab groups, vertical tabs, and side by side viewing for two tabs. Mozilla also brings back compact mode, which reduces the space the interface takes on screen. The browser’s icons now look cleaner and more balanced in light and dark themes, while the new color palette uses purple tones and lighter warm shades. Mozilla also added a glow effect around the active tab button and adjusted spacing across the interface.

In my opinion, the UI update is not nice. What is this jumble of unrelated elements? There is no switch to restore the previous design, and userChrome.css is a partial solution.