In file https://github.com/mozilla/pdf.js/files/5249872/product1.pdf, the fifth text widget has a default appearance using font F1 and this one is neither in DR nor in AcroForm but in AP::N::Resources.
) {
        return null;
      }
      quadPointsLists[i].push({ x, y });
    }
  }
  
  
  
  
  
  
  
  
  
  
  
  
  return quadPointsLists.map(quadPointsList => {
    const [minX, maxX, minY, maxY] = quadPointsList.reduce(
      ([mX, MX, mY, MY], quadPoint) => [
        Math.min(mX, quadPoint.x),
        Math.max(MX, quadPoint.x),
        Math.min(mY, quadPoint.y),
        Math.max(MY, quadPoint.y),
      ],
      [Number.MAX_VALUE, Number.MIN_VALUE, Number.MAX_VALUE, Number.MIN_VALUE]
    );
    return [
      { x: minX, y: maxY },