Rated 5 out of 5 stars
Not a huge fan of the new location of the compatibility data, but I'm going to assume it was changed to accommodate future versions of Firefox. In any case, add-on now works once again as expected; therefore, five stars for you, sir.This review is for a previous version of the add-on (0.5.1). This user has a previous review of this add-on.
The new location was more to keep the information "out of the way" than anything. With 4.0's extension manager rewrite, extensions' titles were given a large font, and it felt rather silly to put such low-priority metadata alongside the title in that case.