uBlock Origin is the emperor of all extensions! Thank you, Raymond Hill!

Must have addon

Good, no problems and works well

When I say that I can't live without it, I'm only slightly exaggerating.

super extension. rien à dire.

装机必备插件，非常好用。可以很方便的用元素提取器自定义添加规则，这个给赞。

Excellent add-on

I don't know if it's just my copy of Firefox or how I configured the settings of my browser, but this thing blocks ads on Spotify's web app!
:o