Not quite a replacement for Tab Mix Plus, but I really like the ability to organize tabs into folders. When jumping between tasks, it's easier to find related tabs. I even realized that I had a few nearly identical tabs after organizing them.

This is the best way I know to manage my tabs. It is absolutely excellent with lots of features.

I can't imagine a life without this addon. Thank you so much Piro.

Fantastic! Thanks!

Great extension for any multi-tasker, end of story.

This extension is absolutely essential for doing research, looking through programming references, and general reading and browsing. I don't remember what I used to do without it!

If you open lots of tabs, then TST is a must! No other browser or add-on can manage your tabs as easily or efficiently. This app is the reason I use Firefox over any other web browser ^_^

This extension is the USP of Firefox and the reason I still use this Browser! Thank you so much Piro (piro_or)...

Tree Style Tab is my first reason after security and privacy to use Firefox. I really can't imagine browsing without such an extension. Great job, Piro!

the best tree style tab extension I've tested so far!