I agree with you!
The only issue I have is Youtube automatically downgrading my Quality setting by one each time I watch a new video.
The following thing happens, if I do NOT manually select 1080p each time I watch a new video:
It starts at 1080p for a couple seconds, then buffers a couple seconds. Afterwards it resumes playing at 720p. If I don't manually reset it to 1080p, the next video starts at 720p, buffers again, and resumes with 480p. This continues all the way down to 144p.
I have not found anything that is able to help me with this issue. By now, I've become accustomed to that, but it's still annoying.
Using the Youtube High Definition addon for FF didn't help.
Anyone got another idea?