I'll expand on Vivaldi a bit:
It spoiled browsers for me, lol. It's frankly so much ahead on UX side of things compared to
any other chromium browsers. (Can't say about FF, because I don't like FF and migrating from chromium to chromium is much less pain as I can retain all the extensions and even keep stuff like indexeddb storage). Workspaces are amazing. Sidebar needed some time to get used to, but is nice to have. The tab stacks are also cool. Customizability is absolutely insane and because its UI is
also html - with enabling one flag you can even add your own css styling to the entire browser (for example I moved some buttons around). And if you're okay with running an install script every time browser updates - even custom JS add-ons. Oh, and you also can customize the hell out of context menu for
everything. Don't like that clutter when you right click on something? Yeet it out! Browser has a lot of features that are not exactly must-haves but are just very nice to have.
...it's not without issues, however. They did improve some aspects of it, but it still has a lot.
- Performance degradation over time is insane. I have to restart the browser a few times a day just so it stop slogging around.
- It doesn't like having a lot of tabs open. When I work I tend to open over 100 tabs and switch between, and that absolutely murders the performance.
- The pop-up windows are very busted. It doesn't respect requested styling and even crash for some, for example paymentwall popup WILL crash Vivaldi.
- Opening new windows is extremely slow compared to other chromiums, and paired with first two issues - it can take up to several seconds for it to open a new window.
- Closing the window also can cause entire browser to freeze for 3-10 seconds if you sent tabs to hibernate before closing or closed a workspace window (actually just a few months ago browser would plain crash if you'd close the window that had tabs in the process of being hibernated).
- Same goes for new tabs - it can and will hickup. It has an annoying bug where you open a new tab, it shows you panels, I click on panel and it then it goes "oh hey, I opened a new tab! I gotta finish initializing it!" and cancels opening the website I just clicked to. Also Ctrl+T -> start writing in address bar muscle memory will screw you up, as it has a lag before you can start typing, otherwise it'll just ignore your input.
- Extensions work by the most part. Mostly. Had a few hickups, mainly with old extensions. The extension button bar is unpleasant in a way that you can't reorder the buttons, only hide/show them. And it can randomly decide to freeze up when opening an extension popup when clicking said buttons. + sometimes it just starts to lag horribly inside those popups. Also extensions don't work in pages you open via sidebar (as you can put custom urls into those).
So yeah, it would be a great browser if not for performance and stability issues. I'll admit, last major update DID improve performance and stability quite a lot. Funnily enough they did that exactly when I was starting to think that technical problems outweigh the UX niceties of the browser and was beginning to look into other browsers. Still using Vivaldi, because while performance is bad, the UX is plain better than anything else I have used so far.
100% compatible with chrome etensions.
As mentioned above - not really 100%. Heck, their forums have a dedicated place where people can report extension incompatibilities.