TIL. I think it's still far behind TreeStyleTabs (TST) on Firefox. Missing for me:
- No nested groups. I know it's called vertical and not tree, but branches offer more context when navigating deep.
- Groups are standalone containers, while in TST the group is the root tab. This saves space but also allows to close/CTRL-F4 a tab to close the group/branch.
- Open in a new tab adds the tab at the end of the group, loosing context. There might be an extension for that.
- Closing a group and all its tabs requires to open a context menu.
- No automatic collapse behavior when selecting other groups and there are lots of tabs open.
- Open in a new tab doesn't create a group automatically, they must be manually initiated. Killer feature for me: by the time I realize I should have created a group it would be too late to bother assembling one.
- Scroll-wheel up/down doesn't quick switch tabs. Killer feature for me.
- Drag'n'drop zone to create a group VS reorder tab action is very small and hard to hit.
Nice feature though. I'm kind of amazed they bothered to implement this yet flat out refuse to re-enable the vertical taskbar lost with Windows 11.