I estimate that TST, all by itself, nearly doubles Firefox's memory footprint. Sidebery freed up 5-10G of memory for me by comparison (yes, way too many tabs...). TST should *not* be a recommended extension. Latest update of TST leaks memory *very badly* and crashes, taking other Firefox extensions and other desktop programs down with it when the OS starts killing things to free up memory. Sidebery is *much* more responsive & performant with a very large number of tabs. This alone will remove a huge amount of friction in reducing the number of open tabs. No more waiting for TST to catch up. Switching to Sidebery was no problem: all nesting retained. Disable TST. Install Sidebery and verify ok. Remove TST. Done.

I have been using TST for about 2 years. It is great and works great for a vertical tab setup.

This is how tabs should work, especially on widescreen monitors.

This add-on makes shopping and doing deep dives so much more convenient. Tabs that go together are automatically shown together.

And for when you don't need it, you can quickly toggle the tab bar on and off with F1

10000$

Love this extension as it's made it easier to move about from Edge. I would like to see the side bar auto-collapse, showing only the favicon.

Useful, polished, heavily customizable. Overall an amazing extension.

This add-on made me change my entire browser experience, once and for all.

I was fighting with tabs for so many years. Constantly having a multitude of open tabs, fearing accidentially closing the window.

I was not very productive, having to scroll and look for tabs all the time.

This add-on was recommended to me, and while it did take some getting used to, I was finally able to conquer the vertical tabs.

Now I've move on from Tree Style Tab, to the more powerful Sidebery, but this is what made me do the jump.

This add-on is the reason I still use Firefox. I salute Piro for keeping this extension going despite Firefox challenges. I really miss auto-hide. I've been having a lot of trouble lately with selecting the folder when I bookmark a tab or tree. The folder box has a - in it, and when selected, pops up an empty box which doesn't respond. Has anyone solved this problem?

Piro is a tab GENIUS

Thank you for your tireless work fighting AMO failures and mozilla defects

Please implement

Ability to place a new tab button in the top bar

Find tabs at the top of the panel

And show an interactive animation line at the bottom of the tabs when loading

Display count tabs