I have never wanted to leave firefox but with this bug still in place for over a week I don't think I can carry on much longer.
Firefox dosn't want me to read youtube comment replies in a conventional manner and I just can't take it anymore. There is no help to be found on mozillas web forum (https://support.mozilla.org/en-US/questions/965905) so if anyone can find a cure and get back to me with one soon, I would be highly grateful. Until then, I'll have to use chrome.
There is a work around that I figured out. Basically if you mess around with the zoom it should get fixed. I didn't know this was a firefox bug though. Anyways a simple ctrl + mouse wheel up and down should fix it, at least temporaly fix it...