Examine source code of Simple Password Generator

{
  "manifest_version": 2,
  "name": "Simple Password Generator",
  "version": "1.0",
  "description": "A simple popup that allows you to randomly generate a password with the length and condition of your own choice.",
  "icons": {
    "48": "icons/spgicon-48.png"
  },
  "browser_action": {
    "default_icon": "icons/spgicon.png",
    "default_title": "PasswordGen",
    "default_popup": "popup/passwordgen.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{58EAC91F-2DCE-456A-85A6-20E15AD9A21B}"
    }
  }
}