Examine source code of JoJo Wiki Redirector

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "JoJo Wiki Redirector",
  "author": "proEndreeper, Modified by morganstedmanms to work for JoJo Wiki",
  "version": "1.1.3",
  "description": "Redirects JoJo Wikia/Fandom requests to jojowiki.com",
  "permissions": [
    "storage",
    "*://jojo.wikia.com/*",
    "*://jojo.fandom.com/*",
    "*://jojowiki.com/*",
    "webNavigation",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icon32.png",
    "default_title": "JoJo Wiki Redirector",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.google.com/*",
        "https://www.google.co.jp/*",
        "https://www.google.co.uk/*",
        "https://www.google.es/*",
        "https://www.google.ca/*",
        "https://www.google.de/*",
        "https://www.google.it/*",
        "https://www.google.fr/*",
        "https://www.google.com.au/*",
        "https://www.google.com.tw/*",
        "https://www.google.nl/*",
        "https://www.google.com.br/*",
        "https://www.google.com.tr/*",
        "https://www.google.be/*",
        "https://www.google.com.gr/*",
        "https://www.google.co.in/*",
        "https://www.google.com.mx/*",
        "https://www.google.dk/*",
        "https://www.google.com.ar/*",
        "https://www.google.ch/*",
        "https://www.google.cl/*",
        "https://www.google.at/*",
        "https://www.google.co.kr/*",
        "https://www.google.ie/*",
        "https://www.google.com.co/*",
        "https://www.google.pl/*",
        "https://www.google.pt/*",
        "https://www.google.com.pk/*"
      ],
      "js": [
        "searchFilter.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 2
}