Looking for Vertigo replacement Rated 4 out of 5 stars

To be honest, I am just looking for a replacement for the Vertigo extension for FF3. I want my tab bar to the left and vertical. Together with Tab Mix Plus, this is a functionality I do not want to lose. I'm not looking for a tree view. Will try it for a while, but I would be great if you would allow users to opt for a completely flat tree, i.e., disable that part of the extension completely.

This review is for a previous version of the add-on (0.7.2008062001).