Nice Rated 4 out of 5 stars
Though the interface is very user-friendly, I wonder what the "target file" and prefix/suffix are dedicated to. A bit of howto would be nice.
Also I noticed your smart extension was missing a locale structure, so
I created one to be grabbed here:
I suggest you should submit it to
http://www.babelzilla.org to get more locale languages for free (currently en-US only)
BabelZilla is a community of volunteer translators dedicated to the
translation of extensions for moz family apps. We have people from all
over the world currently maintaining translations for heaps of exetnsions.
You are welcome to hop on there :)