Examine source code of CP Sync

{
  "manifest_version": 3,
  "name": "CP Sync",
  "version": "1.0.0",
  "description": "Sync your Accepted submissions from online judges to GitHub automatically.",
  "author": "Nafiuw Ebna Nebir (@nafiuw_nebir)",
  "homepage_url": "https://github.com/nafiuw/CP-Sync",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nafiuw@cpsync.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "minimum_chrome_version": "111",
  "permissions": [
    "storage",
    "unlimitedStorage",
    "activeTab",
    "scripting",
    "notifications"
  ],
  "host_permissions": [
    "https://codeforces.com/*",
    "https://*.codeforces.com/*",
    "https://www.codechef.com/*",
    "https://*.codechef.com/*",
    "https://leetcode.com/*",
    "https://neetcode.io/*",
    "https://www.hackerrank.com/*",
    "https://vjudge.net/*",
    "https://atcoder.jp/*",
    "https://www.geeksforgeeks.org/*",
    "https://practice.geeksforgeeks.org/*",
    "https://cses.fi/*",
    "https://api.github.com/*"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "options.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://codeforces.com/*",
        "https://*.codeforces.com/*"
      ],
      "js": [
        "content_scripts/codeforces.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.codechef.com/*",
        "https://*.codechef.com/*"
      ],
      "js": [
        "content_scripts/editor_hook.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.codechef.com/*",
        "https://*.codechef.com/*"
      ],
      "js": [
        "content_scripts/codechef.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    },
    {
      "matches": [
        "https://leetcode.com/*"
      ],
      "js": [
        "content_scripts/leetcode.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://neetcode.io/*"
      ],
      "js": [
        "content_scripts/neetcode.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.hackerrank.com/*"
      ],
      "js": [
        "content_scripts/hackerrank.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    },
    {
      "matches": [
        "https://vjudge.net/*"
      ],
      "js": [
        "content_scripts/vjudge.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://atcoder.jp/*"
      ],
      "js": [
        "content_scripts/atcoder.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.geeksforgeeks.org/*",
        "https://practice.geeksforgeeks.org/*"
      ],
      "js": [
        "content_scripts/editor_hook.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.geeksforgeeks.org/*",
        "https://practice.geeksforgeeks.org/*"
      ],
      "js": [
        "content_scripts/geeksforgeeks.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    },
    {
      "matches": [
        "https://cses.fi/*"
      ],
      "js": [
        "content_scripts/cses.js"
      ],
      "run_at": "document_idle"
    }
  ]
}