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I am trying to override the XMLHttpRequest.protype.open method in Firefox's WebExtension. I have written a following code in content script

var oldOpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function (method, url, async, user, pass) {
    console.log("url :"+url+"\n method: "+method);
    oldOpen.apply(this,arguments);
};

But this code is not working. If anyone know that how to override the XMLHttpRequest.prototype.open method then please let me know.

sam
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1 Answers1

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The scripts making XHR requests have no access to the content script. Your content script has to insert a script with your code into the page. The inserted page script can communicate with the content script by messages. For details inserting a script into a page see here: Insert code into the page context using a content script. For details communicating page script and content script see here: https://developer.chrome.com/extensions/content_scripts (section "Communication with the embedding page")

Community
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user7907168
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