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):

header31012 +
      format31012
    );
  }
  function validateOS2Table(os2, file) {
    file.pos = (file.start || 0) + os2.offset;
    var version = file.getUint16();
    
    
    file.skip(60); 
    var selection = file.getUint16();
    if (version < 4 && selection & 0x0300) {
      return false;
    }
    var firstChar = file.getUint16();
    var lastChar = file.getUint16();
    if (firstChar > lastChar) {
      return false;
    }
    file.skip(6); 
    var usWinAscent = file.getUint16();
    if (usWinAscent === 0) {
      
      return false;
    }
    
    os2.data[8] = os2.data[9] = 0; 
    return true;
  }
  function createOS2Table(properties, charstrings, override) {