Attach (recommended) or Link to PDF file here:
https://www.nta.go.jp/taxes/tetsuzuki/shinsei/annai/joyaku/annai/pdf2/250.pdf

Configuration:
- Web browser and its version: Firefox 81.0a1
- Operating system and its version: Debian 5.6.7-1
- PDF.js version: latest in Firefox nightly
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the pdf and paste the following text "本 店 又 は 主 た る 事 務 所 の 所 在 地" in "Full name" and in "Domicile and residence" textfields
2. Print or Save the pdf 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207547-30f05480-e709-11ea-9abd-2af5d970dc46.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207663-69902e00-e709-11ea-8a1d-1ddd30cf0621.png)

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

annotation.setRectangle([117, 694, 164.298, 720]);
      expect(annotation.rectangle).toEqual([117, 694, 164.298, 720]);
    });
    it("should not set and get an invalid rectangle", function () {
      const annotation = new Annotation({ dict, ref });
      annotation.setRectangle([117, 694, 164.298]);
      expect(annotation.rectangle).toEqual([0, 0, 0, 0]);
    });
    it("should reject a color if it is not an array", function () {
      const annotation = new Annotation({ dict, ref });
      annotation.setColor("red");
      expect(annotation.color).toEqual(new Uint8ClampedArray([0, 0, 0]));
    });
    it("should set and get a transparent color", function () {
      const annotation = new Annotation({ dict, ref });
      annotation.setColor([]);
      expect(annotation.color).toEqual(null);
    });
    it("should set and get a grayscale color", function () {
      const annotation = new Annotation({ dict, ref });
      annotation.setColor([0.4]);
      expect(annotation.color).toEqual(new Uint8ClampedArray([102, 102, 102]));
    });
    it("should set and get an RGB color", function () {
      const annotation = new Annotation({ dict, ref });
      annotation.setColor([0, 0, 1]);
      expect(annotation.color).toEqual(new Uint8ClampedArray([0, 0, 255]));
    });
    it("should set and get a CMYK color", function () {
      const annotation = new Annotation({ dict, ref });