I actually use Manjaro, sue me.
I am genuinely curious what is your issue with the tab bar? I got a long list of issues I have with FF (still my main browser anyways) but the tab bar is not one of them and I always have 20+ tabs open. Not saying your opinion is wrong, just trying to understand why you think so.
The American is how it is supposed to be.
The British one has the “color” changed changed to “colour” due to British spelling of color.
The Spanish one has an upside down semi colon because in Spanish you write questions like this: ¿Is this an example question?
The French one is because the French number system makes absolutely no sense and to say 99 you have to say quatre-vingt-dix-neuf (meaning 4 x 20 + 19).
I hope this helps somehow.
Oh yea, that makes sense. The Chrome ones get super super small I think right? Has been a very long time since I last used it. I personally like it the was FF does it because I can more easily tell what tab is what, but I can totally see how it you would dislike that.
Also good to know something like Sidebery exist.
Thanks for your answer :)