Firefox-Proton-Square VS Firefox-UWP-Style

Firefox 89 isn't supported anymore. Using it would be a security risk. You can still make the current version look the same as before, though. Restore "compact mode" and give this CSS theme a try. If you need help with it, visit /r/FirefoxCSS.

The change between Photon and the current UI was just cosmetic, and you can restore it with userChrome.css.

I was determined enough to design it to my liking, so I searched around found Firefox-Proton-Square (see others here) and set browser.uidensity in about:config to 1. Everything is sharp, compact and clean. Firefox doesn't make it convenient, but things can be done.

Hey there, currently looking or a way to fix the way that the icons work in the theme that I'm using.For some reason, they are offset by a few pixels, as visible in the attached picture. The userChrome.css that I'm using can be found under https://github.com/leadweedy/Firefox-Proton-Square. I don't really know much about Firefox customization, I've just switched to the browser today myself, so sorry if I'm being stupid.

If you prefer to remove all new rounded corners, use Firefox Proton Square instead.

Link to Repo: https://github.com/leadweedy/Firefox-Proton-Square

Somebody wrote instructions (link) on how to install the userChrome.css (download link here)

You could dig into Firefox UWP Style project to achieve this.

Downloaded this theme : https://github.com/Guerra24/Firefox-UWP-Style

Is there a way to highlight active tab with a line instead of box like this theme?

Except for the tab styling. I prefer the flat tab style of dark mode MDL2: https://github.com/Guerra24/Firefox-UWP-Style

Download Github

it seem they change the rule ? however maybe i can tried Firefox-UWP-Style this might be the fastest wat to solve it

I'm using UWP-Style Firefox and am quite happy with it (though I edit the scroll bars and added, that on hover on a tab the icon changes to the close button (cause of many tabs))