PDFs from lumileds.com do not load with PDF.js. Part of the background loads, then only the spinner continues while using 100% CPU. 

An example pdf is http://www.lumileds.com/uploads/17/DS61-pdf 

This behaviour occurs with both the release version of pdf.js in firefox 41.0.2 and the latest .xpi downloaded from this github page.

const current = this.current;
    const font = current.font;
    if (font.isType3Font) {
      return this.showType3Text(glyphs);
    }
    const fontSize = current.fontSize;
    if (fontSize === 0) {
      return undefined;
    }
    const ctx = this.ctx;
    const fontSizeScale = current.fontSizeScale;