content_script.js

document.oncontextmenu = null;
document.addEventListener("contextmenu", (e) => {
  document.oncontextmenu = null;
  e.stopPropagation();
  return true;
}, { capture: true });

manifest.json

{
  "name": "chrome-extension-enable-right-click",
  "version": "0.0.1",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": ["<all_urls>"],
      "js": ["content_script.js"],
      "run_at": "document_start"
    }
  ]
}