Yes, and the lack of a viable vertical tabs solution for Chrome (though some Chrome based browsers have native implementations).
I am baffled how anyone could still be using horizontal tabs as it is clearly inferior. I am also annoyed as hell that it is not native in Firefox.
Mozilla sucks, but it is because all of this should be baked in, not because of pocket or whatever political thing that HN regularly brings up.
I have tried the vertical tab implementation in several other browsers and they are all inferior. Safari’s is hilariously bad.