Foxlim

Foxlim is a slim, compact, and simple oneline stylesheet for the Proton UI Refresh in Firefox Desktop.

Inspired by Waterfall.

Features

• oneline
• layout-only stylesheet (which means that it doesn't break themes)
• simple - most elements are hidden
• sharp - no border radii
• compact - as little padding as possible
• tabs on the left, URL bar on the right
• works with Firefox versions from 128 ESR to 153.

Installation

1. Go to about:config in the URL bar. Search for toolkit.legacyUserProfileCustomizations.stylesheets and double-click it or press Toggle to set it to true.

2. Go to about:profiles in the URL bar and open the root directory of your current profile.

3. Make a new directory called chrome.

4. Download this userChrome.css into that chrome directory.

5. Restart Firefox.

Tip

You can right-click on the chrome, click on Customize Toolbar…, and remove what you don't need.

Tip

Some chrome-related things can be modified through a user.js file.

Other

Other properly-made stylesheets:

• gwfox
• FoxOne
• LittleFox
• Malevich
• zap's cool photon theme

Caution

Proton UI Refresh is still broken and custom stylesheets can only fix some of the superficial problems.

https://discourse.mozilla.org/t/so-now-we-can-not-even-turn-off-proton/83108/

Tip

If you can do without Firefox, use Basilisk, Pale Moon, or a fork of them.

The reason Mozilla doesn't officially support custom browser CSS stylesheets is because they don't know how to use CSS properly. Just open the Browser Toolbox to see the nonsense CSS they wrote for the browser. It's worse than AI-generated. Whoever wrote the CSS for Project Nova and whoever added functions to CSS needs to go to an asylum.

Mozilla needs to simplify their browser's CSS and give userChrome.css and userContent.css highest priority, instead of having to put thousands of "!important" rules in them.

Mozilla isn't the only one, and these problems are symptoms of a much bigger problem, which I'm working on solving forever.