Rated 1 out of 5 stars

Από τον/την pauldev στις Ιούλ. 1, 2008 · μόνιμος σύνδεσμος

Looks like this add-on is going nowhere. Instead of mucking about trying to hack the XPI file, you might has well just use BossKey, which works well.
https://addons.mozilla.org/en-US/firefox/addon/5462