Examine source code of Random Password Generator

{
  "manifest_version": 2,
  "name": "Random Password Generator",
  "version": "1.0",
  "description": "Generates random passwords with a slider and copy them to clipboard.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{51378650-082a-44d6-93b9-5ce194cb8f21}"
    }
  }
}