Attach (recommended) or Link to PDF file here:

songbook.pdf

Configuration:

• Web browser and its version: Firefox 91.8.0esr
• Operating system and its version: Debian bullseye/amd64
• PDF.js version: both the one built into Firefox and the precompiled Stable (v2.13.216)
• Is a browser extension: ?

Steps to reproduce the problem:

1. Navigate to the PDF
2. Hover over either a link in the bookmarks or a link in the index tables

What is the expected behavior? (add screenshot)

The URL in the status bar (indicating the link target) encodes it as something like #H%c3%a4ndel%20--%20Halle%f0%9f%8e%86lujah (also so that people can just type #Händel -- Halle🎆lujah in the browser URL bar and have the link work; as you might know, URLs (including fragment identifiers) shall be UTF-8 encoded).

What went wrong? (add screenshot)

The URL in the status bar is encoded as the binary UTF-16BE value from the PDF, i.e. #%FE%FF%00H%00%E4%00n….

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