Examine source code of LeetTracker

{
  "manifest_version": 3,
  "name": "LeetTracker",
  "version": "1.1.0",
  "description": "Displays company-wise frequency data for LeetCode problems. See which companies ask each question and how often.",
  "permissions": [
    "storage",
    "alarms",
    "activeTab"
  ],
  "host_permissions": [
    "https://leetcode.com/*",
    "https://raw.githubusercontent.com/*",
    "https://api.github.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leetcode-company-tracker@extension",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/problems/*",
        "https://leetcode.com/problemset/*"
      ],
      "js": [
        "utils/normalize.js",
        "utils/heuristics.js",
        "content.js"
      ],
      "css": [
        "panel.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*"
      ],
      "matches": [
        "https://leetcode.com/*"
      ]
    }
  ]
}