Examine source code of CF Analytics234

{
  "manifest_version": 2,
  "name": "CF Analytics",
  "version": "0.1.2",
  "description": "Analyse Codeforces profiles",
  "icons": {
    "16": "src/asset/icon16.png",
    "48": "src/asset/icon48.png",
    "128": "src/asset/icon128.png"
  },
  "browser_action": {
    "default_icon": "src/asset/icon16.png",
    "default_popup": "src/popup.html",
    "default_title": "CF Analytics"
  },
  "background": {
    "scripts": [
      "src/js/eventPage.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://codeforces.com/friends"
      ],
      "js": [
        "src/lib/jquery-3.6.0.min.js",
        "src/js/contentFriends.js"
      ],
      "css": [
        "src/css/contentFriends.css"
      ]
    },
    {
      "matches": [
        "https://codeforces.com/profile/*"
      ],
      "js": [
        "src/lib/jquery-3.6.0.min.js",
        "src/lib/chart.min.js",
        "src/js/contentProfile.js"
      ],
      "css": [
        "src/css/contentProfile.css"
      ]
    }
  ],
  "permissions": [
    "https://codeforces.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e53aeba1-413c-451e-8ba8-53f1cd9e3677}"
    }
  }
}