MacOSVibrant is a one file firefox modification that only works on MacOS. It is themed after apple apps, such as the music app.
You can use any firefox theme you want with it, but it works best with my theme, AppleStyledTheme 2. It is a theme that uses the same colors as the apple dark theme on MacOS.
Currently, this theme is only made to work on dark theme, if there is demand I can update it for light theme.
This theme is based off of ProtoVibrant, and borrows code from Simply Silver/Peach for the tabs.
If you find any bugs, or have a tweak you think could make MacOSVibrant better, please make an issue and we can discuss it!
I hope you enjoy this skin! -May