Examine source code of ZeroWiki

{
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "0.3.1resigned1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "default_locale": "en",
  "browser_action": {
    "default_icon": {
      "16": "icons/zerowiki_icon_16.png",
      "19": "icons/zerowiki_icon_19.png",
      "24": "icons/zerowiki_icon_24.png",
      "32": "icons/zerowiki_icon_32.png",
      "38": "icons/zerowiki_icon_38.png"
    },
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/zerowiki_icon_16.png",
    "24": "icons/zerowiki_icon_24.png",
    "32": "icons/zerowiki_icon_32.png",
    "64": "icons/zerowiki_icon_64.png",
    "128": "icons/zerowiki_icon_128.png",
    "256": "icons/zerowiki_icon_256.png"
  },
  "permissions": [
    "*://*.wikipedia.org/*",
    "webRequest",
    "webRequestBlocking",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d8d7ed36-8e6a-4dfa-9dc5-8ef267ee60cd}"
    }
  }
}