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.

if (this.current.resumeSMaskCtx) {
      this.resumeSMaskGroup();
    }
    
    
    if (
      this.current.activeSMask !== null &&
      (this.stateStack.length === 0 ||
        this.stateStack[this.stateStack.length - 1].activeSMask !==
          this.current.activeSMask)
    ) {
      this.endSMaskGroup();
    }
    if (this.stateStack.length !== 0) {
      this.current = this.stateStack.pop();
      this.ctx.restore();
      
      this.pendingClip = null;
      this._cachedGetSinglePixelWidth = null;
    } else {
      
      this.current.activeSMask = null;
    }
  }
  transform(a, b, c, d, e, f) {