Yeah, big same here. It’s pretty frustrating, because I pay for YouTube premium, but cannot use my preferred browser. I have to use Chromium in order to have it work reliably. Doubly so considering it worked fine in Firefox for YEARS… until maybe six months ago?

It feels like something the FTC should be investigating, or perhaps a European equivalent, but I doubt it will.

The FTC will not investigate anything that was not reported to them. Did you report your experience? They do care about these issues, if you care enough to take six minutes to report it.