Examine source code of Wykop Helper

{
  "manifest_version": 2,
  "name": "Wykop Helper",
  "version": "1.2.0",
  "description": "__MSG_extensionDescription__",
  "default_locale": "pl",
  "icons": {
    "16": "resources/icons/icon_16.png",
    "18": "resources/icons/icon_18.png",
    "19": "resources/icons/icon_19.png",
    "32": "resources/icons/icon_32.png",
    "48": "resources/icons/icon_48.png",
    "64": "resources/icons/icon_64.png",
    "128": "resources/icons/icon_128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "resources/icons/icon_16.png",
      "18": "resources/icons/icon_18.png",
      "19": "resources/icons/icon_19.png",
      "32": "resources/icons/icon_32.png",
      "48": "resources/icons/icon_48.png"
    },
    "default_title": "Wykop Helper",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wykop.pl/link/*",
        "*://*.wykop.pl/ludzie/*",
        "*://*.wykop.pl/mikroblog/*",
        "*://*.wykop.pl/wpis/*"
      ],
      "js": [
        "./shared.js",
        "./inject.js"
      ],
      "css": [
        "./resources/skin/injectStyle.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "resources/icons/icon_18.png"
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b0ee9647-1398-4f5f-9848-08f9c9838b39}"
    }
  }
}