Yeah, I just haven't gotten around packaging the whole thing as a Firefox Addon. It's actually technically possible to run the whole thing on a normal unprivileged webpage (in fact, that's my development environment).

If all you need to do is inject Javascript into a webpage, you should be able to make a Firefox addon to do that in easily under an hour -- check out the SDK getting started guide at https://developer.mozilla.org/en-US/Add-ons/SDK/Tutorials/Ge...

In that case, why not make it available as a javascript bookmark?

http://en.wikipedia.org/wiki/Bookmarklet

Please give us a Firefox version! I'm begging you!

Seconded. This is one of the most incredibly useful projects I've seen in a long time.