It does stop the ads, but it also breaks some of youtubes function, like the channel menu at the top of the page. I do wish it had settings to filter out different ad types and how aggressive it filters.

work well but blocks the comment bar
you can reply to new comments but not post a new comment

works at removing ads, but comes with consequential bugs, such as removing the ability to create new comments. Hopefully this gets fixed because otherwise it is a great addon.

Removes user names and time stamps from comments. Though it does a great job of doing what its supposed to do, if you dont want to read or reply to comments then this app will be great for you, otherwise you will be lost as to who said what and when!

After the latest changes in FF, the AdBlocker causes loss of the whole upper panel in YT, including navigation tabs. After switching off the addition, the effect is gone (and the adds go back, of course).
Linux 64 bit, FF 55.0.2