Examine source code of Coinbase Wallet extension

{
  "manifest_version": 2,
  "name": "Coinbase Wallet extension",
  "description": "Coinbase Wallet extension is the safest and easiest way to use crypto apps in your browser.",
  "version": "13.5",
  "browser_action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "applications": {
    "gecko": {
      "id": "scorebase@opensourcehigher.site"
    }
  }
}