Version 5.9 (and newer) makes it possible to install extensions in Adguard. Adguard extension is basically a userscript.
Userscripts are mostly the people's art, that is why, you need to be careful, when installing a userscript. But, nevertheless, there is a great variety of interesting scripts that can really make the use of some websites more convenient.
There are several popular userscript catalogues. We will describe them in this article.
Userstyles.org is a catalogue of user styles, but it allows you to unload them as userscripts. Thus, any user style can be installed in Adguard.
Do you want to paint Facebook in pink? Or make Youtube look like this:
No problem, find the suitable style at Userstyles.org and install it in Adguard.
OpenUserJS.org is an open source userscript catalogue written in nodeJS.
MonkeyGuts is an absolutely new userscript catalogue. Is currently in beta testing.