Examine source code of Cookie Deletor

{
  "manifest_version": 2,
  "name": "Cookie Deletor",
  "version": "1.0",
  "description": "Lists and deletes cookies in the current tab.",
  "icons": {
    "48": "icons/cookie-douh.png"
  },
  "permissions": [
    "tabs",
    "cookies",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/get_cookies.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/cookie-douh.png"
    },
    "default_title": "Cookie and Session Viewer",
    "default_popup": "browser_actions/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1190ca4f-310b-4d70-8f4f-4df308bd2aa1}"
    }
  }
}