Examine source code of PartFinder cookie handler

{
  "manifest_version": 2,
  "name": "PartFinder cookie handler",
  "description": "Allows to set cookies for autologin to sites",
  "version": "1.4resigned1",
  "content_scripts": [
    {
      "matches": [
        "http://3priedez.net/partfinder/red.php*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "bg.js"
    ],
    "persistent": false
  },
  "applications": {
    "gecko": {
      "id": "partfinder@3priedez.net",
      "strict_min_version": "42.0"
    }
  },
  "icons": {
    "128": "engine.png"
  },
  "permissions": [
    "cookies",
    "tabs",
    "http://*/*",
    "https://*/*"
  ]
}