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):

ta.unsafeUrl).toEqual(expectedUnsafeUrl);
            ta.dest).toBeUndefined();
            ta.newWindow).toEqual(expectedNewWindow);
          });
        }
        
        const annotation1 = checkJsAction({
          jsEntry: 'function someFun() { return "qwerty"; } someFun();',
          expectedUrl: undefined,
          expectedUnsafeUrl: undefined,
          expectedNewWindow: undefined,
        });
        
        const annotation2 = checkJsAction({
          jsEntry: "window.open('http://www.example.com/test.pdf')",
          expectedUrl: new URL("http://www.example.com/test.pdf").href,
          expectedUnsafeUrl: "http://www.example.com/test.pdf",
          expectedNewWindow: undefined,
        });
        
        const annotation3 = checkJsAction({
          jsEntry: new StringStream(
            'app.launchURL("http://www.example.com/test.pdf", true)'
          ),
          expectedUrl: new URL("http://www.example.com/test.pdf").href,
          expectedUnsafeUrl: "http://www.example.com/test.pdf",
          expectedNewWindow: true,
        });
        Promise.all([annotation1, annotation2, annotation3]).then(
          done,