I don't know when this happened, but today I noticed that I cannot paste text into Youtube comments on Firefox 40.0.3. It still works just fine on Chrome. I tried to use an addon to copy plain text only, but that didn't help, nor have I ever needed it before. Restarting the browser didn't help either.
What I mean is: When I press "paste" either by right clicking or Ctrl + V, nothing happens. I could still type into the comments normally. I can otherwise paste just fine to anywhere else, just not into Youtube comments...
Is this Google's latest monopoly trick or something, or what is going on?