You don't actually even notice that it has these features unless you turn them on. I use Vivaldi because it has really nice built-in tab features, such as tiling, stacking and workspaces, all of which I find invaluable on a laptop or single-screen setup. Its history screen is also quite handy and I find many of these features much more accessible than other browsers, which often streamline things to the point of being annoying.

I previously used Firefox, but it seemed really buggy at times, and the mobile version was especially bad on my old Pixel 4a for some reason, so I switched to Kiwi on mobile for extension support.