Examine source code of Selective Cookie Remover

{
  "manifest_version": 2,
  "name": "Selective Cookie Remover",
  "description": "Remove cookies from selected domains",
  "permissions": [
    "cookies",
    "http://*/*",
    "https://*/*",
    "storage",
    "background",
    "tabs"
  ],
  "version": "1.12resigned1",
  "content_scripts": [
    {
      "run_at": "document_idle",
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "cookie_remover.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "cookie_remover.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4843dd05-78db-4b9f-b761-fba4382352a7}"
    }
  }
}