Attach (recommended) or Link to PDF file here: [ar99.pdf](https://github.com/mozilla/pdf.js/files/7086733/ar99.pdf)
https://www.dallasfed.org/fed/~/media/documents/fed/annual/1999/ar99.pdf 

Configuration:
- Web browser and its version: Firefox Browser 72.0.2 (64-bit)
- Operating system and its version: Windows 10 Enterprise version 1809
- PDF.js version: 2.4.152
- Is a browser extension:

Steps to reproduce the problem:
1. Open URL
2. Observe

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/60226822/72994265-6a03c780-3dbc-11ea-8914-42563b321546.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/60226822/72994291-77b94d00-3dbc-11ea-9de2-6214a4d4b361.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

t["TimesNewRomanPS-BoldMT"] = "Times-Bold";
  t["TimesNewRomanPS-Italic"] = "Times-Italic";
  t["TimesNewRomanPS-ItalicMT"] = "Times-Italic";
  t.TimesNewRomanPSMT = "Times-Roman";
  t["TimesNewRomanPSMT-Bold"] = "Times-Bold";
  t["TimesNewRomanPSMT-BoldItalic"] = "Times-BoldItalic";
  t["TimesNewRomanPSMT-Italic"] = "Times-Italic";
});
const getFontNameToFileMap = getLookupTableFactory(function (t) {
  t.Courier = "FoxitFixed.pfb";
  t["Courier-Bold"] = "FoxitFixedBold.pfb";
  t["Courier-BoldOblique"] = "FoxitFixedBoldItalic.pfb";
  t["Courier-Oblique"] = "FoxitFixedItalic.pfb";
  t.Helvetica = "FoxitSans.pfb";
  t["Helvetica-Bold"] = "FoxitSansBold.pfb";
  t["Helvetica-BoldOblique"] = "FoxitSansBoldItalic.pfb";
  t["Helvetica-Oblique"] = "FoxitSansItalic.pfb";
  t["Times-Roman"] = "FoxitSerif.pfb";
  t["Times-Bold"] = "FoxitSerifBold.pfb";
  t["Times-BoldItalic"] = "FoxitSerifBoldItalic.pfb";
  t["Times-Italic"] = "FoxitSerifItalic.pfb";
  t.Symbol = "FoxitSymbol.pfb";
  t.ZapfDingbats = "FoxitDingbats.pfb";
  t["LiberationSans-Regular"] = "LiberationSans-Regular.ttf";
  t["LiberationSans-Bold"] = "LiberationSans-Bold.ttf";
  t["LiberationSans-Italic"] = "LiberationSans-Italic.ttf";
  t["LiberationSans-BoldItalic"] = "LiberationSans-BoldItalic.ttf";
});
/**
 * Holds the map of the non-standard fonts that might be included as