Examine source code of LeetCode Contest User Search

{
  "manifest_version": 3,
  "name": "LeetCode Contest User Search",
  "version": "1.0",
  "description": "Search LeetCode contest ranking pages for one or more usernames.",
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "host_permissions": [
    "https://leetcode.com/contest/*/ranking/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/contest/*/ranking/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leetcode-rank-search@Marcus.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}