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):

var strOffset = 0;
    for (i = 0, ii = platforms.length; i < ii; i++) {
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        var nameRecord =
          platforms[i] + 
          encodings[i] + 
          languages[i] + 
          string16(j) + 
          string16(str.length) +
          string16(strOffset);
        nameTable += nameRecord;
        strOffset += str.length;
      }
    }
    nameTable += strings.join("") + stringsUnicode.join("");
    return nameTable;
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      var renderer = FontRendererFactory.create(this, SEAC_ANALYSIS_ENABLED);
      return shadow(this, "renderer", renderer);
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    exportData(extraProperties = false) {