Examine source code of TrustID

{
  "manifest_version": 2,
  "name": "Trust-ID",
  "version": "1.0.1",
  "description": "An extension built for smooth KYC registration",
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/16.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "assets/contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "connection.html",
    "confirm.html",
    "assets/*.js"
  ],
  "externally_connectable": {
    "matches": [
      "<all_urls>"
    ]
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "applications": {
    "gecko": {
      "id": "trust-id@yourdomain.com",
      "strict_min_version": "91.0"
    }
  }
}