Send a JS comand to Firefox

[MouseOnBatteries]

Hey folks,

i'm new to this great community and greet you all. I know AutoIt quite a while by now and accomplished serverel little projects so far. So i already have a basic understanding of the language and just need some poiters for the project i'm currently on.

I am trying to inject some Greasemonkey/Javascript scripts into a running Firefox window in order to fill out certain forms or create additional menus there. Basically it's a big community page which already offers kind of a quick lunch tray for such Greasemonkey scripts. But in order to preserve traffik, i'am trying to build an external one. I already made a GUI which stores them and allows to add/delete and sort/arrange. But i'm not sure how to send them to the browser an run them there.

I would appreciate any help you could give me.