I could almost swear it wasn't there two days ago when I looked hard for it.

Can somebody explain to me what that means, in simpler words?

Will I be able to remote-control my mozilla from a perl script? That would be very usefull to me. It would mean I can use it together with Test::Simple (and others) to do testing of a project that involves Perl as well as javascript code. I know that exists for IE, but if I can remote-control Mozilla instead, I don't need to keep a machine under windows.

Or does it mean that I will be able to use Perl instead of Javascript, but it will only work for those clients who have Perl installed?

I looked through the XPCOM article and quite frankly couldn't make heads nor tails of it.

It would be good if both would apply.

As you can currently with JS it would be useful to be able to write extensions using perl, or deliver perl based XUL apps from web sites.

I have worked on extensions but would rather do so in Perl than JS.

(edited because I assumed to much..oops)