Not a fan of the new look. If you’re in the same boat, plug:
about:config
into your URL bar, and search for:
browser.nova.enabled
Toggle it to false using the button to the right.
There are functional changes that Nova also introduced: this won’t effect those - only the aesthetic.


You used to actually be able to theme Firefox, is this returning? All you have now are crummy backgrounds to clutter the visually bland buttons and menus.
Edit: this was meant as a reply to the post linking to their blog. And it looks like the answer is ”no, eat your porridge”.
People still write full ui CSS overhaul sorts of themes, does that not count…?
Do you have an example? I tried finding a theme that makes the browser look like Netscape Navigator, but the ones I found were lackluster. The icons on the buttons didn’t even change.
This is what I use. There’s even a flatpak app to keep the theme up to date for
https://github.com/rafaelmardojai/firefox-gnome-theme