I tried it for ten minutes.
It feels like any other browser except tabs are stacked vertically on the left side, there's no address bar or really... *any* bar at the top at all, and if you want to search you have to open a new tab which is easy (either click "new tab" in the tab bar or press CTRL + T like any other browser, except when you're used to browsing using an address bar it is ... weird).
Besides that, really not seeing what all the hype was about. It feels like any other Chromium-based browser just with a lot more real estate for websites because of the missing toolbars at the top.
And apparently there are no bookmarks.
RS3: UltimaSuende
https://letterboxd.com/BMovieBro/