Useful, Professional look, customizable and supports 3º party addons.

There is something weird compared to other vertical tab managers and is that there is no filter bar. I hope that there will be one in the future in TST or as TST's addon.

Die Anordnung mit vertikaler Baumstruktur erfolgt völlig willkürlich. Ih empfinde das als sinnlos und macht die Tabs unübersichtlich. Es wäre besser keine vertikale Baumstruktur aufgezwungen zu bekommen.

I got a notifcation about "noticable changes to Tree Style Tabs" that said "click here to read about it", but clicking the notification did nothing.

And then all the tabs became suddenly un-styled.

This is my favorite extension since 2003.

Version 3.5.17 removed both of the dark theme options. I refuse to use a light theme, & so reverted to Version 3.5.13 (the latest predecessor).

Otherwise the extension is pretty cool.

Great addon, but not sure why the Plain Dark theme was removed, was a perfect match for my dark browser theme. Had to revert to an older version.

Absolutely love this extension, however it says I can't add it to firefox because it's corrupt. Any suggestions?

A complete overhaul about tab controlling... It becomes one of the reasons that motivating me to keep using Firefox today (with no exaggeration :P

(Fixed, with extreme swiftness. More congratulations)
Piro, the savior of Firefox. Many, many thanks.
But I think version 3.5.7 broke TST Hoverswitch, equally fundamental for me.