Rated 2 out of 5 stars
I used this addon for a few days and liked it a lot. I thought I will make it one of the addons I keep always enabled. But then I discovered that while TST is enabled, it breaks firefox 15 and the sidebars will not open. This applies to all sidebars - Bookmarks, History etc., as well as the sidebars that other extensions like Read it Later, Scrapbook plus or Update Notifier open.
For many addons opening a sidebar is essential to their function. So, I simply cannot keep Tree Style Tabs until it keeps breaking the sidebars. Uninstalled it.
I have tested TST extensively and found that the sidebar dissappearence is not caused by any conflict with other addons, it is caused by TST alone. I hope the developer takes note and rectifies the error. This is too good an addon to waste itself like this.
I couldn't reproduce the problem
I'm using TST with Firefox 15 but I've never seen such a problem. It can be caused by conflicting with other addons.