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):

for (var charCode in charCodeToGlyphId) {
          if (glyphId === charCodeToGlyphId[charCode]) {
            return charCode | 0;
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        }
        newMapping.charCodeToGlyphId[
          newMapping.nextAvailableFontCharCode
        ] = glyphId;
        return newMapping.nextAvailableFontCharCode++;
      }
      var seacs = font.seacs;
      if (SEAC_ANALYSIS_ENABLED && seacs && seacs.length) {
        var matrix = properties.fontMatrix || FONT_IDENTITY_MATRIX;
        var charset = font.getCharset();
        var seacMap = Object.create(null);
        for (var glyphId in seacs) {
          glyphId |= 0;
          var seac = seacs[glyphId];
          var baseGlyphName = StandardEncoding[seac[2]];
          var accentGlyphName = StandardEncoding[seac[3]];
          var baseGlyphId = charset.indexOf(baseGlyphName);
          var accentGlyphId = charset.indexOf(accentGlyphName);
          if (baseGlyphId < 0 || accentGlyphId < 0) {
            continue;
          }