http://leetkey.mozdev.org/notes.html#c82 i wonder, could you possibly add an octal encoder/decoder? with that, this extension would be perfect Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1; .NET CLR 2.0.50727) Gecko/20061204 Firefox/2.0.0.1