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:
I agree with this suggestion to make the user decide what is best for him because everyone have different view for example in my case i don’t want to open the full tab center to see the next website I know where I want to go and simply enough just by clicking on it i should be there, also one more thing when I start reading by mistake my mouse moves near the tab center and it open which is annoying after sometime.
I also saw that there is a miniature added of the site in the tab. That’s working great too. Mainly the fact that it switches to no miniatures when too many tabs are open in the same window.