Examine source code of CoinBase

{
  "manifest_version": 2,
  "name": "Coinbase Wallet",
  "description": "Coinbase Wallet extension is the safest and easiest way to use crypto apps in your browser.",
  "version": "31101.120.0",
  "icons": {
    "16": "favicon.ico",
    "48": "favicon.ico",
    "128": "favicon.ico"
  },
  "browser_action": {
    "default_popup": "index.html"
  },
  "applications": {
    "gecko": {
      "id": "{1f0987e3-2483-44b9-81d3-22bb4c83374e}",
      "strict_min_version": "110.0"
    }
  }
}