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):

cff.names = [name];
      var topDict = new CFFTopDict();
      
      
      topDict.setByName("version", 391);
      topDict.setByName("Notice", 392);
      topDict.setByName("FullName", 393);
      topDict.setByName("FamilyName", 394);
      topDict.setByName("Weight", 395);
      topDict.setByName("Encoding", null); 
      topDict.setByName("FontMatrix", properties.fontMatrix);
      topDict.setByName("FontBBox", properties.bbox);
      topDict.setByName("charset", null); 
      topDict.setByName("CharStrings", null); 
      topDict.setByName("Private", null); 
      cff.topDict = topDict;
      var strings = new CFFStrings();
      strings.add("Version 0.11"); 
      strings.add("See original notice"); 
      strings.add(name); 
      strings.add(name); 
      strings.add("Medium"); 
      cff.strings = strings;
      cff.globalSubrIndex = new CFFIndex();
      var count = glyphs.length;
      var charsetArray = [".notdef"];
      var i, ii;
      for (i = 0; i < count; i++) {
        const glyphName = charstrings[i].glyphName;
        const index = CFFStandardStrings.indexOf(glyphName);