CSS for blocking ads
Add to the userContent.css the following line:
@import url('https://lukaszjablonski.github.io/adblocss/userContent.css');To test it or use it temporary, run it from a bookmark. Details: https://lukaszjablonski.github.io/adblocss/bookmark/
You might also like: https://css-tricks.com/css-for-blockin-stuff/