I switched to Vivaldi about 3 months ago and I can confirm it's a whole new world. The ability to manage tab groups and workspaces makes my work much simpler, more organized and fluid. As far as I'm concerned, it doesn't lack any of the Firefox featu...
In my personal crusade to convince work colleagues and friends to use Firefox, the answer I get is almost always the same: "but the browser I use (Opera or Chrome in 90% of cases) is more comfortable and Firefox does not have tab grouping". Even thou...