Examine source code of LeetCode VS Code Auth Sync

{
  "manifest_version": 3,
  "name": "LeetCode VS Code Auth Sync",
  "version": "0.1.6",
  "description": "Syncs your signed-in leetcode.com browser session to the LeetCode with Auth Sync VS Code extension on localhost.",
  "permissions": [
    "cookies",
    "storage",
    "webRequest"
  ],
  "host_permissions": [
    "https://leetcode.com/*",
    "http://127.0.0.1/*"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "action": {
    "default_title": "LeetCode Auth Sync",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leetcode-vscode-auth-sync@leetcode-open-source",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  }
}