[ErikBjare]

What's wrong with the available extensions, like Treestyletabs?

[nextaccountic]

I would love to see TST integrated in Firefox

TST (or one of its plugins) may become buggy and a memory hog if you have too many tabs. Things like dragging tabs stop working if you have too many tabs opened at once

I just wish that, when they integrate a subset of functionality of TST, further extensions can customize its behavior (like currently extensions can customize TST adding new functionality)

[lproven]

JFWIW it is now in Waterfox... kinda.

https://www.waterfox.net/blog/waterfox-x-treestyletab/

[Tarq0n]

If you just want a vertical tab list, Vertical Tabs Reloaded stays performant up to thousands of tabs for me.

[squigz]

TST is one of those things I can't live without anymore. Even if they did implement native vertical tabs, I'm sure it wouldn't be nearly as featureful, not to mention the various plugins for it

[batiudrami]

I mean there are plenty of things wrong with it. It’s a workaround, so:

* if you use this, you can’t use any other sidebar at the same time

* you need to put in custom userchrome.css to hide top tabs. Once you’ve done this you can’t easily swap between vertical and horizontal tabs.

* it’s ugly and, while not exactly buggy, there is a lot of UI weirdness that comes with it being a workaround

I still use it and have done for years but native support would be a big improvement.

[nine_k]

TST is not ugly at all, but definitively is an exquisite hack. This fact limits its capabilities and sometimes even its usability.

OTOH, Tree Style Tab is the best thing that happened to the Firefox UI in last few years.