Examine source code of Copy for Google Sheets

{
  "manifest_version": 3,
  "name": "Copy Fixed Text for Google Sheets",
  "version": "1.0",
  "description": "An add-on to copy a fixed text to clipboard for easy pasting into Google Sheets.",
  "permissions": [
    "clipboardWrite"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "x7hilarioschwartztiy5192@hotmail.com"
    }
  }
}