Chrome extension: set/mock response data

Question

I'm experimenting with the chrome extension's background script. I have the following

chrome.webRequest.onBeforeRequest.addListener(
  function(details) {
    return {cancel: true};
  },
  {urls: ["<all_urls>"]},
  ["blocking"]
);

Here I can block requests. Now my question is, how can I return a response without making the trip to the backend?

question from:https://stackoverflow.com/questions/65852773/chrome-extension-set-mock-response-data

Answer 1

Waitting for answers