Rizki Kelimutu:

Firefox is evolving with a refreshed design that makes the browser feel more modern, approachable, and consistent across desktop and mobile. The refresh also extends to Firefox’s voice and writing style, making product experience feel more human, direct, and unmistakably Firefox.

Via Jeff Johnson:

Nothing says “consistent” like making your large-screen keyboard & mouse UI exactly like your tiny touchscreen UI.

And nothing says “more human” like a manufactured voice and writing style.

rjacob:

Internally, we’ve been calling this work Project Nova, and today we’re excited to share a deeper look at what we’ve been building and where we’re heading next.

The goal of this work is to create a more cohesive foundation for Firefox: making the browser feel cleaner, warmer, faster, and more adaptable.

Some of the areas we’re working on include:

• Simpler navigation and a redesigned Settings experience
• Easier access to features like tab groups, split view, and vertical tabs
• The return of Compact Mode
• Refreshed visual updates across tabs, icons, spacing, and browser surfaces
• More customization options, including new themes and wallpapers

Previously:

• New Mozilla CEO
• Mozilla Changes Firefox Terms of Use
• Firefox at 20
• The Negative Impact of Mobile-First Web Design on Desktop

Update (2026-07-28): athomas (via Thomas Clement):

Starting today, you can try out the next design evolution of Firefox in Nightly.

It’s still Firefox, now with a more cohesive look and feel across tabs, menus, panels, and other browser surfaces. You’ll notice softer tab shapes, a warmer color palette, updated icons, and – after hearing from many of you – the return of Compact Mode and new theme options to make Firefox your own.

Still no AppleScript support.

Update (2026-08-04): Marcin Wichary:

Contra the previous post, just spotted this “Same settings, new look!” callout in Firefox, on a page I have never visited before, talking about a feature I have never used[…]