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 charCode;
    this.name = name;
    this.loadedName = properties.loadedName;
    this.isType3Font = properties.isType3Font;
    this.missingFile = false;
    this.glyphCache = Object.create(null);
    this.isSerifFont = !!(properties.flags & FontFlags.Serif);
    this.isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
    this.isMonospace = !!(properties.flags & FontFlags.FixedPitch);
    var type = properties.type;
    var subtype = properties.subtype;
    this.type = type;
    this.subtype = subtype;
    let fallbackName = "sans-serif";
    if (this.isMonospace) {
      fallbackName = "monospace";
    } else if (this.isSerifFont) {
      fallbackName = "serif";
    }
    this.fallbackName = fallbackName;
    this.differences = properties.differences;
    this.widths = properties.widths;
    this.defaultWidth = properties.defaultWidth;
    this.composite = properties.composite;
    this.cMap = properties.cMap;
    this.ascent = properties.ascent / PDF_GLYPH_SPACE_UNITS;