Attach (recommended) or Link to PDF file here:
https://www.nta.go.jp/taxes/tetsuzuki/shinsei/annai/joyaku/annai/pdf2/250.pdf

Configuration:
- Web browser and its version: Firefox 81.0a1
- Operating system and its version: Debian 5.6.7-1
- PDF.js version: latest in Firefox nightly
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the pdf and paste the following text "本 店 又 は 主 た る 事 務 所 の 所 在 地" in "Full name" and in "Domicile and residence" textfields
2. Print or Save the pdf 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207547-30f05480-e709-11ea-9abd-2af5d970dc46.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207663-69902e00-e709-11ea-8a1d-1ddd30cf0621.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

const buffer = [
    date.getUTCFullYear().toString(),
    (date.getUTCMonth() + 1).toString().padStart(2, "0"),
    date.getUTCDate().toString().padStart(2, "0"),
    date.getUTCHours().toString().padStart(2, "0"),
    date.getUTCMinutes().toString().padStart(2, "0"),
    date.getUTCSeconds().toString().padStart(2, "0"),
  ];
  return buffer.join("");
}
/**
 * Promise Capability object.
 *
 * @typedef {Object} PromiseCapability
 * @property {Promise<any>} promise - A Promise object.
 * @property {boolean} settled - If the Promise has been fulfilled/rejected.
 * @property {function} resolve - Fulfills the Promise.
 * @property {function} reject - Rejects the Promise.
 */
/**
 * Creates a promise capability object.
 * @alias createPromiseCapability
 *
 * @returns {PromiseCapability}
 */
function createPromiseCapability() {
  const capability = Object.create(null);
  let isSettled = false;
  Object.defineProperty(capability, "settled", {
    get() {