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):

if (index === -1) {
          strings.add(glyphName);
        }
        charsetArray.push(glyphName);
      }
      cff.charset = new CFFCharset(false, 0, charsetArray);
      var charStringsIndex = new CFFIndex();
      charStringsIndex.add([0x8b, 0x0e]); 
      for (i = 0; i < count; i++) {
        charStringsIndex.add(glyphs[i]);
      }
      cff.charStrings = charStringsIndex;
      var privateDict = new CFFPrivateDict();
      privateDict.setByName("Subrs", null); 
      var fields = [
        "BlueValues",
        "OtherBlues",
        "FamilyBlues",
        "FamilyOtherBlues",
        "StemSnapH",
        "StemSnapV",
        "BlueShift",
        "BlueFuzz",
        "BlueScale",
        "LanguageGroup",
        "ExpansionFactor",
        "ForceBold",
        "StdHW",
        "StdVW",
      ];