Rated 5 out of 5 stars
Only I have lost much time to figure out how to change to an other language.
The earlier idea from another user (Akerbeltz) is not a bad one "Simple, works really well. Might be a tad easier for the average user if selecting a new locale would automatically download the xpi file for that language but either way, good work!"
But you can also explain how to use your Add-on on this site....another possibility. But nentheless great Add-on!
Keep up the good work!