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):

annotationDict.set("A", actionDict);
        const annotationRef = Ref.get(88, 0);
        const xref = new XRefMock([
          { ref: annotationRef, data: annotationDict },
        ]);
        const pdfManager = new PDFManagerMock({
          docBaseUrl: "http://www.example.com/test/pdfs/qwerty.pdf",
        });
        AnnotationFactory.create(
          xref,
          annotationRef,
          pdfManager,
          idFactoryMock
        ).then(({ data }) => {
          ta.annotationType).toEqual(AnnotationType.LINK);
          ta.url).toEqual(
            new URL("http://www.example.com/test/pdfs/Part II/Part II.pdf").href
          );
          ta.unsafeUrl).toEqual("Part II/Part II.pdf");
          ta.dest).toBeUndefined();
          ta.newWindow).toEqual(true);
          done();
        }, done.fail);
      }
    );
    it(
      "should recover valid URLs from JavaScript actions having certain " +
        "white-listed formats",
      function (done) {
        function checkJsAction(params) {