Rated 5 out of 5 stars

This is an excellent extension, when needing a easy way to testing incompatible themes or extensions after an Firefox update, by modifying the rdf file and then backing them up with "FEBE" extension or one similar. The alternative would be to update Firefox to the max version that all your extensions would still work if modifying rdf files is out the question.

This review is for a previous version of the add-on (2.8).