Examine source code of LeetHub-3.0

{
  "manifest_version": 2,
  "name": "LeetHub-3.0",
  "description": "Automatically integrate your Leetcode submissions to GitHub",
  "homepage_url": "https://github.com/raphaelheinz/LeetHub-3.0",
  "version": "0.0.15",
  "author": "Raphael Heinz",
  "browser_action": {
    "default_icon": "assets/thumbnail.png",
    "default_popup": "src/html/popup.html"
  },
  "icons": {
    "16": "assets/thumbnail.png",
    "48": "assets/thumbnail.png",
    "128": "assets/thumbnail.png"
  },
  "background": {
    "scripts": [
      "src/js/browser-polyfill.js",
      "src/js/background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "unlimitedStorage",
    "storage",
    "tabs",
    "https://leetcode.com/*",
    "https://github.com/*",
    "https://api.github.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/*",
        "https://github.com/*"
      ],
      "js": [
        "src/js/browser-polyfill.js",
        "src/js/leetcode.js",
        "src/js/authorize.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "leethub@firefox.vthree",
      "strict_min_version": "109.0"
    }
  }
}