Allows you to customize websites, BUT there is a catch... It has spyware. If you don't know what spyware is, its a virus that, well, spy's on you and tracks you. This extension will steal your browsing data and sell it to other companies.

There is a similar extension called Stylus, which is basically the same as this but it does NOT have spyware. The link to the extension is: https://addons.mozilla.org/en-CA/firefox/addon/styl-us/

spyware, use stylus instead. the same extension (every single theme works) but without all the spyware

It's a glorious day: Stylus just surpassed Stylish in number of users on AMO. Seriously, don't download this trash extension.

Geiles addon alles veränderbar

Developer abandoned the extension and added spyware to record your browser history. Use Stylus instead: https://addons.mozilla.org/en-US/firefox/addon/styl-us/

Spyware, do not use