I'm interested in this extension, and encouraged that the five people who've rated it so far have given it an overall rating of 4.1... But I have concerns.

The features list looks very large and ambitious, yet the support page (which throws up a security warning due to not using https, by the way), although very well-structured, gives only a very basic description of a few basic features. As I click through the pages, I find a page for each feature, but almost no information on each of those pages.

On the first page, there's a step-by-step explanation of how to create the first tabset, and then how to add a couple of tabs to it. However, there's no explanation or example given of how that works once there is more than one tab group involved. For example, does the "save" option appear for every tab group in the list, and then I just or just the one that was most recently selected? Also, there's no explanation of how/whether one can add a pre-existing tab, or several related tabs, into a chosen tabset?

I've tried various tab-management add-ons for various browsers in the past, and often experienced lost tabs and corrupted browser sessions just as I was starting to enjoy using them. This one seems like an ambitious project still in its very early stages. Lots of (planned) features means there's lost of opportunities for small but catastrophic bugs. As such, I'm reluctant to try out it until I see evidence of more progress; or at least, more thorough and useful documentation.