In Firefox 144, I can open vertical tabs and use Sidebery, but Firefox sidebar remains open on the side. I can remove it by setting always-show and hide-sidebar in config, but it reappears every time I restart.
Is there a way to permanently disable it?
I removed sideberry once vertical tabs came along. Any reason to use it over the built in way?
Yes, tabs in Sidebery are “tree style”, you can build them into trees and collapse/expand them, also unload, group, bookmark whole branches and trees.
Vertical tabs are, well, just tabs stacked vertically. They are not nested, do not provide context, can’t be collapsed/expanded (or folded/unfolded, whatever you prefer). Sidebery just has many more features than just “woohoo you can see tabs vertically instead of horizontally” Firefox now provides.