Attach (recommended) or Link to PDF file here: ROZPORZĄDZENIE MINISTRA CYFRYZACJI

Configuration:

• Web browser and its version: Firefox Release 87.0
• Operating system and its version: openSUSE Tumbleweed [20210420]
• PDF.js version:
• Is a browser extension: no

Steps to reproduce the problem:

1. Tell the reader to use a moving magnifier.

What is the expected behavior? (add screenshot)
The magnifier should magnify a rectangular area around the pointer in an overlay.

What went wrong? (add screenshot)
There is no such tool.

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