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 possibleSpaceReplacements = ["space", "minus", "one", "i", "I"];
      var width;
      for (var i = 0, ii = possibleSpaceReplacements.length; i < ii; i++) {
        var glyphName = possibleSpaceReplacements[i];
        
        if (glyphName in this.widths) {
          width = this.widths[glyphName];
          break;
        }
        var glyphsUnicodeMap = getGlyphsUnicode();
        var glyphUnicode = glyphsUnicodeMap[glyphName];
        
        var charcode = 0;
        if (this.composite && this.cMap.contains(glyphUnicode)) {
          charcode = this.cMap.lookup(glyphUnicode);
        }
        
        if (!charcode && this.toUnicode) {
          charcode = this.toUnicode.charCodeOf(glyphUnicode);
        }