brodokkFollowing my previous post earlier about my "Screeeeee" button, iv made a *small* upgrade of my custom mastodon UI with https://addons.mozilla.org/en-US/firefox/addon/stylish/
Big thks to @HugoBDesigner (check the custom css rules over there: https://gist.github.com/HugoBDesigner/1a784bf782b5994efecfb9e3adf85fc6) And yes sorry its purple not green 
Stylish - Custom themes for any website – Get this Extension for 🦊 Firefox (en-US)
Download Stylish - Custom themes for any website for Firefox. Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.
Zaira Wolfe