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