Recently I've been working on a Firefox extension, and needed a way to test the code. While testing code is always important, it is particularly important for dynamic languages where code that hasn't been run is more likely to be buggy. I had not experience in how to do this for Firefox extensions, soEric suggested I try out Mozmill. which has been quite helpful so far. There were no Ubuntu packages for it, so I've put some together in my PPA for anyone interested: