This is a suggestion as my screen is not that big and when I have my developers tools I do not have enough space to have the tab center pinned, as by default it is quiet large.
I would like to have it at 30 or 50% depending on my needs.
Vivaldi is making a nice job from it. Once you rollover a tab you get a preview of it:
And there you can also place several tabs in one (with same rollover option):
Please to not get me wrong when I am showing examples from other browsers but I though it was the best way to explain myself.
Thank you again for the great work.