Examine source code of IP Viewer

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.2",
  "description": "__MSG_extensionDescription__",
  "default_locale": "pl",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "__MSG_extensionName__"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{438da8f2-7c1e-4fa3-919b-1ef5380c3b80}"
    }
  }
}