Examine source code of Browser Lock

{
  "manifest_version": 3,
  "name": "Browser Lock",
  "version": "1.0.0",
  "description": "Lock your browser with password, security questions, and timed recovery.",
  "author": "Komoid",
  "homepage_url": "https://www.komoid.com",
  "permissions": [
    "tabs",
    "storage",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Browser Lock",
    "default_icon": {
      "16": "icons/icon-16.svg",
      "48": "icons/icon-48.svg",
      "128": "icons/icon-128.svg"
    }
  },
  "icons": {
    "16": "icons/icon-16.svg",
    "48": "icons/icon-48.svg",
    "128": "icons/icon-128.svg"
  },
  "commands": {
    "lock-browser": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "Command+Shift+L"
      },
      "description": "Lock the browser"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "browser-lock@komoid.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}