Mozilla unveils Project Nova visual overhaul and AI toggle for Firefox

Mozilla has unveiled Project Nova, the most significant visual overhaul of its Firefox browser in six years, featuring a redesigned interface with softer tabs, a fire-inspired color palette, and a new Settings menu that includes a single toggle to disable all artificial intelligence features. The update is expected to roll out later this year, with early testing already available in Firefox Nightly builds.

The redesign introduces rounded, bubble-like tabs and a refreshed color scheme with warm oranges, reds, and neutral tones. Icons have been standardized for consistency across light and dark themes. Compact mode, a feature that condenses browser controls to reclaim vertical screen space, is returning after being removed years ago. Mozilla said the update aims to make the browser feel warmer, faster, and more cohesive.

Central to Project Nova is a reworked Settings section designed to make privacy controls easier to find and understand. A prominent toggle allows users to disable all current and future AI features at once. Mozilla emphasized that Firefox AI models are not downloaded onto a user's computer unless they actively choose to use them, even if the full block is not...