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):

return Promise.reject(
        new Error("Built-in CMap parameters are not provided.")
      );
    }
    return fetchBuiltInCMap(name).then(function (data) {
      var cMapData = data.cMapData,
        compressionType = data.compressionType;
      var cMap = new CMap(true);
      if (compressionType === CMapCompressionType.BINARY) {
        return new BinaryCMapReader().process(
          cMapData,
          cMap,
          function (useCMap) {
            return extendCMap(cMap, fetchBuiltInCMap, useCMap);
          }
        );
      }
      if (compressionType === CMapCompressionType.NONE) {
        var lexer = new Lexer(new Stream(cMapData));
        return parseCMap(cMap, lexer, fetchBuiltInCMap, null);
      }
      return Promise.reject(
        new Error(
          "TODO: Only BINARY/NONE CMap compression is currently supported."
        )
      );
    });
  }
  return {
    async create(params) {