Firefox Nova interface was announced - Mozilla plans to end Proton

[Aleksandra0056]

Last week, Mozilla announced that Firefox would soon receive new Nova interface that would replace Proton this year. I want to ask about future of Firefox UI Fix, if it would adapt to new Nova interface or if Firefox UI Fix would become no longer relevant and discontinued?

I think, that Firefox UI Fix should not be discontinued, because it is one of most greatest projects I ever seen, but when Nova interface would eventually replace Proton in near future, Firefox UI Fix would almost certainly need very complex and fundamental changes to its code.

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https://www.omgubuntu.co.uk/2026/03/firefox-nova-redesign
https://winaero.com/mozilla-firefox-is-getting-a-new-nova-user-interface-style/

[reoreoxz616]

Hello!
Thank you so much for your kind words and for following the project so closely. It's really encouraging to hear that you find Firefox UI Fix valuable!

Regarding the Nova interface, you are absolutely right. Since Nova introduces a significant visual overhaul—including rounded "islands" and dynamic colors—it will likely require a major rewrite of our current CSS code.

We don't have plans to discontinue the project yet, but the transition from Proton to Nova will be a huge challenge. Once Nova reaches a more stable state in Nightly builds, we will start investigating how to adapt our fixes to the new design. Stay tuned for updates!