My problem is - last time I looked, which was a while ago to be fair - there weren't good tab management plugins that also supported tab title search, a list of tabs to easily close ones I didn't need anymore with ctrl+click or shift+click, no session management, problems with cross window tab viewing/searching, no tab stacks, and now workspaces are kind of awesome for me too.

I'm not saying there aren't extensions for each thing, I'm saying I could NOT get them all to work together, and have a fast performant browser without weird hangs, and the UI was kind of all over the place and hard to remember cause none of the extensions were designed to work together from what I could tell.

What I don't get is why Vivaldi didn't code on top of Firefox, but I think it's because there are sites that work in chromium and don't in Firefox, and fail silently - and just like in IE6 days, they're sites like my parents retirement site, they can't NOT use them.