Examine source code of No More Playlists

{
  "manifest_version": 3,
  "name": "No More Playlists",
  "version": "1.0.0",
  "description": "Open YouTube playlist and shared watch URLs as clean normal watch URLs.",
  "author": "No More Playlists contributors",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "https://www.youtube.com/*",
    "https://m.youtube.com/*",
    "https://youtu.be/*"
  ],
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "action": {
    "default_title": "No More Playlists",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.svg",
      "96": "icon.svg"
    }
  },
  "content_security_policy": {
    "extension_pages": "default-src 'none'; script-src 'self'; style-src 'self'; img-src 'self'; object-src 'none'; base-uri 'none'; form-action 'none';"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "js": [
        "url-rules.js",
        "page-guard.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "js": [
        "settings.js",
        "settings-bridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "settings.js",
      "url-rules.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{68e5ffb0-0058-42f8-8311-663a7783d6b1}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}