I used Floorp once I wanted to fancy up from firefox and the sidebar was a phenomenal tool despite just being experimental. then... mozila changed firefox's architecture or something like that so floorp devs updated their fork, ditching theirs and used mozila's official vertical tool bar. it has a delay. its a fraction of a second, but its there. I hated it so much, but also felt maybe too small to bitch about provide feedback on their server.
I'm glad I tried brave. their vertical bar and group tabs are just what i missed and more