Honestly, I think people shouldn’t need that many tabs open at any one time.
Regarding your solution, it seems somewhat blocky to me and I wouldn’t want to lose my (separate) navigation bar. If instead, you just put 3-5 mini tabs in the top left for tab grouping, then I’d be interested. Edge is well underway with different tab groups, but maybe having them on-screen without the need for a menu would be nice.
@suguru Exactly, overview widget is one of my favourite. Fortunately for next release we will employ Muon, so Miniature and Brave will be on the same page technology wise and hopefully Brave team will consider incorporating this widget taking our code.