Examine source code of webLocker

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "homepage_url": "https://www.facebook.com/realrecordzlab",
  "description": "",
  "default_locale": "en",
  "permissions": [
    "<all_urls>",
    "tabs",
    "activeTab",
    "contextMenus",
    "notifications",
    "webRequest",
    "webRequestBlocking"
  ],
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "version": "2.0.0",
  "content_security_policy": "script-src 'self' ; object-src 'self'"
}