I'm still coping with the loss of TabGroups. With than in mind I decided to change the way I work with Firefox. Even after reducing the number of tabs per window I still had to figure out how to find the tabs quickly. This solves completely the link I was missing in my new (forced) workflow. Congratulations for the neat implementation of this tab searching. I hope your extension gets featured since even after searching 'tab search', it did appear but not at the top of the search results here in Addons. Nice work!