Firefox tab bar at bottom of window.

screenshot

Firefox userChrome JS script.

Tested on firefox 140.

Difference from other CSS code:

• Also uses JS to manipulate DOM
• Handle fullscreen status by JS MutationObserve

Notice: do not load this code by tab bar itself, or firefox will infinite loop.

This repo only contains the specific function, doesn't contain the code to enable userchrome scripts.

For how to enable, see: (also more of my scripts)

https://garywill.github.io/#Firefox-userChrome-CSS-or-JS