Rated 3 out of 5 stars

For what its worth you can get this extension working in Tb15 by performing a max version hack on the install.rdf file contained withing the .xpi file
Look for the line <em:maxVersion>

This review is for a previous version of the add-on (1.1.0).  This user has a previous review of this add-on.

I've updated the max version, and the theme should install in TB15 to TB17 now. There do appear to be some minor bugs with the new version, though nothing major. Hopefully I'll be able to fix those soon.

If only Mozilla would quit changing the UI every few months...