[sigtstp]

Interesting! Some overlap with these Firefox add-ons:

- Tree Style Tabs: https://addons.mozilla.org/en-US/firefox/addon/tree-style-ta... (more simplistic, no session saving functionality)

- Tree Tabs: https://addons.mozilla.org/en-US/firefox/addon/tree-tabs (more complex, can also save sessions, but incompatible with some other add-ons and not evaluated for security by Mozilla)

Neither rearrange tabs in the window, just offer an alternate tree listing of open tabs.

[ta988]

Sideberry is a more advanced version of those.

[Izkata]

Firefox did have an addon to show tabs in a grid in the same window, but it died along with XUL.

[johnofthesea]

Wish there was also something with Miller columns.

[minhaz23]

i’ve only ever seen foxytab rearrange tabs in the window