SVG-filters, for transfer maps, are not applied in the Firefox PDF Viewer

[Snuffleupagus]

Attach (recommended) or Link to PDF file here: https://github.com/mozilla/pdf.js/blob/master/test/pdfs/issue6931_reduced.pdf

Configuration:

• Web browser and its version: Firefox Nightly 112
• Operating system and its version: Windows 11
• PDF.js version: 3.5.34 [a0ef5a4]
• Is a browser extension: N/A

Steps to reproduce the problem:

1. Load https://mozilla.github.io/pdf.js/web/viewer.html
2. Open issue6931_reduced.pdf in the demo viewer.
3. Open issue6931_reduced.pdf directly in Firefox.

What is the expected behavior? (add screenshot)
Since the demo viewer and the built-in Firefox PDF Viewer uses the same PDF.js version, rendering should be identical; note the correct rendering in the demo viewer:

What went wrong? (add screenshot)
It appears that the SVG-filter, for the transfer map, isn't actually applied in the built-in Firefox PDF Veiwer:

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

/cc @calixteman

[calixteman]

Oh! I discovered the same bug and filed a bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1821408

(I missed the gh mail)