It was pretty interesting when I updated and my reaction was and still is "Oh wow. This looks great."

Then I came across some threads about the new UI expecting everyone to be congratulating Mozilla on a job well done but instead were just on fire with vitriol about how it may be the worst thing to ever happen. I didn't even notice the dozen of tiny changes all of these people found.

I'm not a tab slouch either (typically 250+ tabs open accompanied by the shame and anxiety that brings) so I'd expect to be pretty sensitive to even minor inconveniences added to the tab bar but apparently not.

I really like the Close Tab button on the left, so while custom userChrome.css still works, I've fixed that. But for the rest, it's fine for me.

Same here, i have no idea what the fuss is about… but i assume i don’t run into these issues because i have a different workflow.

Me three. At first it was a bit jarring, now I've forgotten what it used to be like. I definitely don't tab horde though and I've only got 4 open right now for example.