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TechnologyMay 22, 2026· 2 min read

Firefox: a brand new interface is coming soon, and you can activate it right away. Here’s how

Mozilla has officially announced the development of Project Nova, a significant renewal of the user interface and user experience of Firefox that will debut stable by the end of the year.

The company stated that it will not be a complete overhaul but rather an evolution that the development team describes as a refresh rather than a replacement, designed to align the browser with current web dynamics. The overall aesthetic will set aside the harsher lines in favor of softer tab shapes, redesigned icons, and a warm color palette that explicitly recalls the brand's visual identity. The goal is visual consistency, standardizing menus, panels, and controls between desktop versions and those intended for mobile devices.

Official Project Nova: Mozilla launches the new Firefox interface

Privacy remains the central pillar of development, but the way tools are presented to the user will change. Features such as the integrated VPN and anonymous browsing mode will be placed in much more visible and accessible locations within the UI, facilitating those approaching the software for the first time.

At the same time, the settings menu will undergo restructuring to make it easier to manage advanced tracking protection. In this section, a kill switch will debut to completely disable features related to artificial intelligence, ensuring total control for those who do not wish to integrate AI-based tools during browsing.

On the productivity front, Project Nova will integrate essential tools for managing complex workflows, simplifying access to tab groups, split view, and vertical tabs.

Mozilla has decided to listen to the historical feedback from the community, confirming the official return of compact mode, a highly requested option by users who prefer an information-dense interface with reduced vertical spacing. The update will also significantly impact accessibility, with targeted interventions on contrast, visual comfort in dark mode, and keyboard navigation.

There will also be news on the performance front: historically lagging in pure performance tests compared to Chromium-based engines, Firefox claims a 9% increase in loading speed for the main content of pages over the past year. According to Mozilla, the enhancement of tracking blocker systems will directly contribute to this performance boost, easing the browser's workload during rendering.

The entire evolution of Nova will continue to be based on community feedback, but for the more curious users, there’s already a way to test the changes. By using the experimental Firefox Nightly versions, you can type about:config in the address bar to access the advanced configuration editor. From there, simply create the boolean preference browser.nova.enabled, set the value to true, and restart the application to unlock the preview interface, keeping in mind potential stability issues typical of development builds.