How to modify the New Tab page in Firefox with Stylish? - Super User

Stylish 3.1.2 and greater - Add-on Support - Mozilla Discourse

Stylus – Get this Extension for 🦊 Firefox (en-US)

Alternatives to Stylish for Firefox

Melbourne (Firefox CSS, FF 29 and above) by noha-ra on DeviantArt

Firefox Shopping

Stylish appears to have been removed from the Google Chrome store : r/ firefox

Another Dimension

GMail 2 - Dark Blue Google Inspired, Firefox+Stylish or Gre…

Stylish can change your web experience easy Chrome and Firefox Add-on

extensions.stylish.editorWindowMode=0 [show editor in a tab (default)] not followed if no userstyles installed, editor opens in separate window instead · Issue #248 · stylish-userstyles/stylish · GitHub