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 (lastCharIndex < code) {
          lastCharIndex = code;
        }
        var position = getUnicodeRangeFor(code);
        if (position < 32) {
          ulUnicodeRange1 |= 1 << position;
        } else if (position < 64) {
          ulUnicodeRange2 |= 1 << (position - 32);
        } else if (position < 96) {
          ulUnicodeRange3 |= 1 << (position - 64);
        } else if (position < 123) {
          ulUnicodeRange4 |= 1 << (position - 96);
        } else {
          throw new FormatError(
            "Unicode ranges Bits > 123 are reserved for internal usage"
          );
        }
      }
      if (lastCharIndex > 0xffff) {
        
        
        lastCharIndex = 0xffff;
      }
    } else {
      
      firstCharIndex = 0;
      lastCharIndex = 255;
    }
    var bbox = properties.bbox || [0, 0, 0, 0];