Follow up with issue: https://github.com/mozilla/pdf.js/issues/14146
Merged pull req: https://github.com/mozilla/pdf.js/pull/14189

Attach (recommended) or Link to PDF file here:
https://bug1708641.bmoattachments.org/attachment.cgi?id=9219459

- This popup appears because JS is enabled;
- And because the pdf contains some unsupported features (e.g. XFA);

Configuration:
- Firefox Nightly & Chrome
- macOS Big Sur 11.6

Steps to reproduce the problem:
1. Run gulp server
2. Open attached pdf

What is the expected behavior? 
No popup on open

What went wrong?
![error](https://user-images.githubusercontent.com/76935202/139354112-707887a2-a6a1-43a9-a92e-45d57c48206a.jpg)



this._timeoutIdsRegistry = new FinalizationRegistry(
        this._cleanTimeout.bind(this)
      );
    } else {
      this._timeoutIdsRegistry = null;
    }
    this._timeoutCallbackIds = new Map();
    this._timeoutCallbackId = 0;
    this._globalEval = data.globalEval;
    this._externalCall = data.externalCall;
    this._document = data._document;
  }
  
  
  _dispatchEvent(pdfEvent) {
    this._eventDispatcher.dispatch(pdfEvent);
  }
  _registerTimeoutCallback(cExpr) {
    const id = this._timeoutCallbackId++;
    this._timeoutCallbackIds.set(id, cExpr);
    return id;
  }
  _unregisterTimeoutCallback(id) {
    this._timeoutCallbackIds.delete(id);
  }
  _evalCallback({ callbackId, interval }) {