Home/ Questions/Q 54155
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-10T17:10:32+00:00

I’m creating a Firefox extension for demo purposes. I to call a specific JavaScript

  • 0

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 inside extension, but a page that is loaded by Firefox):

document.funcToBeCalled = function() {    // function body };

Then, the extension will run this on some event:

var document = Application.activeWindow.activeTab.document; document.funcToBeCalled();

However it raises an error saying that funcToBeCalled is not defined.

Note: I could get an element on the document by calling document.getElementById(id);

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 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

    • 0