Examine source code of Redirect Sorry Pages

{
  "manifest_version": 2,
  "name": "Redirect Sorry Pages",
  "description": "Once a Google sorry page redirects to the corresponding page, all other pages redirect automatically. You can manually redirect all pages by clicking the extension.",
  "version": "1.3.6",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.google.com/sorry/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_action": {},
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1c01ba04-7cb7-447c-a5e7-cd84065155d1}"
    }
  }
}