
Attach (recommended) or Link to PDF file here:
[NAPEN16171380959.pdf](https://github.com/mozilla/pdf.js/files/6143802/NAPEN16171380959.pdf)

Configuration:
- Web browser and its version: Firefox 88 Nightly
- Operating system and its version: Windows 10
- PDF.js version:
- Is a browser extension: No

What went wrong? (add screenshot)
![](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2021-03-15-10-58-27-ce2796.png)


cffFile = new Stream(tables["CFF "].data);
          cff = new CFFFont(cffFile, properties);
          adjustWidths(properties);
          return this.convert(name, cff, properties);
        }
        delete tables.glyf;
        delete tables.loca;
        delete tables.fpgm;
        delete tables.prep;
        delete tables["cvt "];
        this.isOpenType = true;
      } else {
        if (!tables.loca) {
          throw new FormatError('Required "loca" table is not found');
        }
        if (!tables.glyf) {
          warn('Required "glyf" table is not found -- trying to recover.');
          
          tables.glyf = {
            tag: "glyf",
            data: new Uint8Array(0),
          };
        }
        this.isOpenType = false;
      }
      if (!tables.maxp) {
        throw new FormatError('Required "maxp" table is not found');
      }
      font.pos = (font.start || 0) + tables.maxp.offset;
      var version = font.getInt32();