Attach (recommended) or Link to PDF file here:
See pdf in https://github.com/mozilla/pdf.js/issues/3109

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: Windows 10
- PDF.js version: builtin viewer

Steps to reproduce the problem:
1. Look at outlines

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514798-0e656865-1cbf-4fb8-a89b-530d36da23c9.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514740-c95e0237-8bf4-4129-a4a5-cb2ea5a3f4df.png)

if (verbosity >= VerbosityLevel.WARNINGS) {
    console.log(`Warning: ${msg}`);
  }
}
function unreachable(msg) {
  throw new Error(msg);
}
function assert(cond, msg) {
  if (!cond) {
    unreachable(msg);
  }
}
function isSameOrigin(baseUrl, otherUrl) {
  let base;
  try {
    base = new URL(baseUrl);
    if (!base.origin || base.origin === "null") {
      return false; 
    }
  } catch (e) {
    return false;
  }
  const other = new URL(otherUrl, base);
  return base.origin === other.origin;
}
function _isValidProtocol(url) {