Examine source code of Codeforces Dark Theme

{
  "manifest_version": 3,
  "name": "Codeforces Dark Theme",
  "version": "1.0.3",
  "description": "Dark theme for Codeforces (ports the userscript into a browser extension)",
  "browser_specific_settings": {
    "gecko": {
      "id": "codeforces-darktheme@gaurav7902.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Codeforces Dark Theme",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://codeforces.com/*",
        "*://*.codeforces.com/*"
      ],
      "js": [
        "utils.js",
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "darktheme.css",
        "desert.css",
        "monokai.css",
        "imgs/*",
        "icons/*"
      ],
      "matches": [
        "*://codeforces.com/*",
        "*://*.codeforces.com/*"
      ]
    }
  ]
}