It is possible to use the Forge Trigger.IO framework to develop an extension for Internet Explorer that examines resources or HTTP requests before they load and arbitrarily decides to allow or block them?
I assume a possible way of doing this would be by running a content script on 'start' and adding a listener to check for any loading resource, but there should be a better way of doing this. (i.e. Firefox's nsIContentPolicy or Chrome's webRequest API)