This is an experimental prototype for a new user interface for Firefox Panorama in the form of a Firefox add-on. Code is based on cleercode/mozaic.
Note that for this add-on to populate with tab groups, tab group data needs to be initialized by opening the current implementation of Panorama first.
This add-on uses the PageThumbsStorage API available only in Firefox 16+. In my brief testing, I wasn't able to get it to work in 17. Seems to work only in 16 at this point.