Examine source code of Coinbase

{
  "manifest_version": 3,
  "name": "Coinbase Wallet extension",
  "description": "Coinbase Wallet extension is the safest and easiest way to use crypto apps in your browser.",
  "version": "3.120.1",
  "icons": {
    "16": "favicon.ico",
    "48": "favicon.ico",
    "128": "favicon.ico"
  },
  "action": {
    "default_popup": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4ea69a3-46ee-4976-99a2-7d3cb7fe7fa2}"
    }
  }
}