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.

unreachable("Should not call beginImageData");
  }
  paintFormXObjectBegin(matrix, bbox) {
    if (!this.contentVisible) {
      return;
    }
    this.save();
    this.baseTransformStack.push(this.baseTransform);
    if (Array.isArray(matrix) && matrix.length === 6) {
      this.transform.apply(this, matrix);
    }
    this.baseTransform = this.ctx.mozCurrentTransform;
    if (bbox) {
      const width = bbox[2] - bbox[0];
      const height = bbox[3] - bbox[1];
      this.ctx.rect(bbox[0], bbox[1], width, height);
      this.clip();
      this.endPath();
    }
  }
  paintFormXObjectEnd() {
    if (!this.contentVisible) {
      return;
    }
    this.restore();
    this.baseTransform = this.baseTransformStack.pop();
  }
  beginGroup(group) {