Very very nice tutorial ! I was looking for something like this I was actually thinking of writing something similar with WWW::Selenium using Greasemonkey+Firefox+some_http_server_running_perl from "scratch" that would inject code in the page using AJAX to communicate between Perl and Javascript but now I'm more confident of WWW::Selenium s powers

I have tried Selenium myself,installed it on my computer,it takes a pretty big hit on the resources as I remember...it was written in Java I think,it opened up it's own http server and had installed a firefox extension on my firefox.

Basically the same thing can be done with Greasemonkey since it allows one to write code exactly after the page is rendered.