Chrome extension to block common third-party background requests

background.js

var urls = [
  '*://graph.facebook.com/*',
  '*://platform.twitter.com/*',
  '*://*.google-analytics.com/*'
];

var response = function() {
  return { cancel: true };
}

chrome.webRequest.onBeforeRequest.addListener(response, { urls: urls }, ['blocking'] );

manifest.json

{
  "name": "Block Hosts",
  "version": "0.1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}