Examine source code of 10 Minute Mail

{
  "manifest_version": 3,
  "name": "10 Minute Mail",
  "version": "0.3",
  "description": "Temporary disposable email for 10 minutes. Protect your privacy.",
  "icons": {
    "16": "assets/icon-16.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "assets/icon-16.png",
      "48": "assets/icon-48.png",
      "128": "assets/icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "notifications",
    "tabs",
    "activeTab",
    "alarms"
  ],
  "host_permissions": [
    "https://10minutemail.co/*",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "10minutemail@10minutemail.co",
      "strict_min_version": "109.0"
    }
  }
}