Examine source code of XKCD Random Comic Fixer

{
  "manifest_version": 2,
  "name": "XKCD Random Comic Fixer",
  "version": "1.0",
  "description": "Fixes the 'Random' button on xkcd.com to redirect to xkcd 221. Icon credits go to Randall Munroe (XKCD)",
  "icons": {
    "16": "icons/xkcd-16.png",
    "32": "icons/xkcd-32.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.xkcd.com/*"
      ],
      "js": [
        "xkcd-rand-fix.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{b1641db5-bd1f-4742-b849-9f0bbdd51156}"
    }
  }
}