Examine source code of Password Generator Plus

{
  "name": "Password generator",
  "version": "5.3",
  "description": "Password generator | this is a compact and fast extension that will help you generate a new secure password in a second",
  "browser_action": {
    "default_icon": "favicon128.png",
    "default_popup": "index.html"
  },
  "icons": {
    "16": "favicon16.png",
    "48": "favicon48.png",
    "128": "favicon128.png"
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "favicon16.png",
    "favicon48.png",
    "favicon128.png",
    "index.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{17c00b24-7ebc-485d-aff5-8f23f1c9875a}"
    }
  }
}