@jon Yes, I did. I'm not fan of Workspaces, but I get the idea. Quick comands, not yet; the searchable windows not either.

I do not tend to have so many tabs open at the same time, I guess.

@jon OK, I tried them. They are nice to have, but for users who manage many tabs at the same time. It is not my case.

One thing I like a lot about Firefox is the about:config page. My main change is content.notify.backoffcount > 0. It stops the browser partial refreshes, and shows a web page only when its parts finished loading. In my experience, it makes the browsing faster and more comfortable for my eyes.

It could be a nice switch to have in Vivaldi too.

@jon (Although Chromium-based browsers' main selling point is speed.)

Firefox does not have tab groups or workspaces (yet?) but you can mimic the experience with Sidebery.

Related links:
https://kb.mozillazine.org/Content.notify.backoffcount
https://addons.mozilla.org/en-US/firefox/addon/sidebery