How do I execute a page-defined JavaScript function from a Firefox extension?

Question

I\'m creating a Firefox extension for demo purposes. I to call a specific JavaScript function in the document from the extension. I wrote this in my HTML document (not insid

Answer 1

It is for security reasons that you have limited access to the content page from extension. See XPCNativeWrapper and Safely accessing content DOM from chrome,

If you control the page, the best way to do this is set up an event listener in the page and dispatch an event from your extension (addEventListener in the page, dispatchEvent in the extension).

Otherwise, see http://groups.google.com/group/mozilla.dev.extensions/msg/bdf1de5fb305d365