Examine source code of A2SV Companion

{
  "manifest_version": 3,
  "name": "A2SV Companion",
  "version": "1.3.0",
  "description": "Sync LeetCode/Codeforces submissions to GitHub & Google Sheets",
  "permissions": [
    "storage",
    "alarms"
  ],
  "host_permissions": [
    "https://leetcode.com/*",
    "https://codeforces.com/*",
    "https://a2sv-companion.onrender.com/*",
    "https://a2sv-companion-backend.onrender.com/*",
    "https://companion-u9zk.onrender.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "a2sv-companion@a2sv.org",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_title": "A2SV Companion",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_page": "pages/options.html",
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/problems/*"
      ],
      "js": [
        "leetcode.js"
      ],
      "css": [
        "inject.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://codeforces.com/contest/*/problem/*",
        "https://codeforces.com/contest/*/my",
        "https://codeforces.com/problemset/problem/*/*",
        "https://codeforces.com/gym/*/problem/*",
        "https://codeforces.com/group/*/contest/*/problem/*"
      ],
      "js": [
        "codeforces.js"
      ],
      "css": [
        "inject.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://atcoder.jp/*",
        "https://www.hackerrank.com/challenges/*",
        "https://www.hackerrank.com/contests/*/challenges/*",
        "https://practice.geeksforgeeks.org/problems/*",
        "https://www.geeksforgeeks.org/problems/*"
      ],
      "js": [
        "fallbackGeneric.js"
      ],
      "css": [
        "inject.css"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "fallback.html",
        "leetcodeCodeInjector.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}