Examine source code of Password Generator

{
  "name": "Password Generator",
  "short_name": "PG-E",
  "version": "1.4",
  "description": "The K+ Password Generator to go!",
  "icons": {
    "32": "icons/logo32x32.png",
    "48": "icons/logo48x48.png",
    "128": "icons/logo128x128.png"
  },
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4dc1d86-71b4-43ab-bc11-72082e8d5c15}"
    }
  }
}