Examine source code of User&PassowrdGenerator

{
  "manifest_version": 2,
  "name": "User&PassowrdGenerator",
  "version": "1.0",
  "description": "Username and Password Generator",
  "icons": {
    "48": "icon/logo.png"
  },
  "browser_action": {
    "default_icon": "icon/logo.png",
    "default_title": "User&PassowrdGenerator",
    "default_popup": "popup/generator.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "addon4896@example.com"
    }
  }
}