Examine source code of Geo-IP Widget

{
  "applications": {
    "gecko": {
      "id": "geoIPWidget@china-cheats.com"
    }
  },
  "version": "1.1.4resigned1",
  "manifest_version": 2,
  "name": "Geo-IP Widget",
  "short_name": "geoipwidget",
  "homepage_url": "http://china-cheats.com",
  "description": "Geo-IP Widget allows you to Check IP Address from your Web Browser. It Comes with Google Maps Incl. a StreetView & Satellite Feature",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png"
  },
  "background": {
    "page": "lib/chrome/background.html"
  },
  "options_ui": {
    "chrome_style": true,
    "page": "data/options/options.html"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "data/icons/32.png",
    "default_title": "Geo-IP Widget",
    "default_popup": "data/content_script/panel.html"
  },
  "permissions": [
    "storage",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "run_at": "document_start",
      "matches": [
        "*://*/*"
      ],
      "js": [
        "data/content_script/inject.js"
      ]
    }
  ]
}