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.

This is an excellent answer and I wish I knew all of this when starting to use archlinux. “Arch does not support partial upgrades” is something you can read everywhere, but it’s rare to find such a good explanation of what exactly a partial upgrade is, and which commands lead to it.

I only learned about all of this when I got into some broken state by randomly running pacman commands.

Everyone, be like this guy. This guy explains stuff well. Newbies need stuff explained.

I remember liking weechat but if you prefer GUI, quassel is also good.

I’m sorry, where’s the button to save all private tabs to collection?