Code is here:
http://pastebin.com/ufWYs2Pk
The summary is that ".onclick" appears to be unavailable on images in
FF4, greasemonkey 0.9.1. The code works fine on Chrome's integrated
greasemonkey emulation and I think it used to work in FF 3.6 but I
can't really test that anymore.
Any suggestions how to work around this? It's a big problem for me.
Charlie Reiman