Examine source code of Cookie Filter

{
  "browser_action": {
    "browser_style": true,
    "default_title": "_MSG_description_",
    "default_popup": "cookies.html",
    "default_icon": "icons/logo_64.png"
  },
  "description": "List all cookies in the active tab.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "manifest_version": 2,
  "name": "Cookies",
  "version": "2.0",
  "permissions": [
    "cookies",
    "<all_urls>",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad145d38-3883-4970-bb11-703b30e1ad1f}"
    }
  }
}