firefox-material-adapted

Adapta GTK Mod for Firefox 57+. Adapta is an adaptive Gtk+ theme based on Material Design Guidelines. Adapta is one of the most popular GTK themes available for Linux. Now is available for Firefox via mod too.

Installation

1. Download Firefox web browser.
2. Download the latest release of Material Adapted mod.
3. Copy userChrome.css and userContent.css to ./local/.mozilla/firefox/xxxxxxxx.default-xxxxxxxx/chrome/ .
4. Start Firefox to apply the new Material Adapted mod.
5. Install the Adapta GTK Theme (WebExtension) from Firefox Add-ons to completely match the Adapta GTK Theme guidelines
6. Install both .xpi file extensions via Firefox

Any question, please refer to original post at Ubuntuleon.com (in Spanish)