Removes typical comments like 'first' and 'I'm early'. Everything can be modified to the users liking.
< Feedback on YouTube Comment Filter
I didn't test for FireFox to be completely honest. Will look into it and report back as soon as I can.
Greasemonkey was acting a but funky for me and the script didn't work the first time somehow. The second time it did work though.
Will you check for me if the script has a checkmark in front of it when you click on the Greasemonkey icon? To check if the script is active, press F12 and click on a video. In the "Console" tab, a console log with "YTCR" is shown that the script is active. You should see the "SPAM" flag next to the amount of comments, just like in this screenshot: https://raw.githubusercontent.com/TomONeill/youtube-comment-filter-script/master/screenshots/preview.png
it doesn't work for me
Comments are not removed by the selected conditions.
firefox 47.0.1
Greasemonkey 3.9