Attach (recommended) or Link to PDF file

test#1.pdf

Web browser and its version

any

Operating system and its version

window10

PDF.js version

latest

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

1.Open demo https://mozilla.github.io/pdf.js/web/viewer.html
2.Open local pdf file : test#1.pdf

What is the expected behavior?

display full file name: test#1.pdf

What went wrong?

The title of viewer.html is "1.pdf", and so is the download file name.

Link to a viewer

No response

Additional context

No response