[Bug]: ghostscript rewritten PDFs show fonts incorrectly in pdf.js

[brianclinkenbeard]

Attach (recommended) or Link to PDF file

https://github.com/user-attachments/files/23527111/main__compressed.pdf

Web browser and its version

Firefox 147.0.1

Operating system and its version

Fedora Linux 43

PDF.js version

5.4.445

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

Yes

Is a browser extension

No

Steps to reproduce the problem

1. Generate a document with LuaTeX or typst (font I used: TeX Gyre Pagella)
2. Run the file through ghostscript. For me this looks like: gs -dPrinted=false -sDEVICE=pdfwrite -o output.pdf input.pdf
3. pdf.js shows text incorrectly and elongates characters. Please see this issue for examples: Running typst pdf output through ghostscript breaks fonts typst/typst#7373
   The rewritten file does not appear incorrectly in Okular.

What is the expected behavior?

pdf.js shows text correctly and does not elongate characters

What went wrong?

Correct original / ghostscript rewritten viewed in other viewers like Okular:

pdf.js:

Link to a viewer

No response

Additional context

Tested and issue occurs on latest git master as well. Setting browser.display.use_document_fonts to 0 in Firefox is a workaround.

[calixteman]

I can reproduce the issue with Firefox on Fedora.
It's fine if I set pdfjs.disableFontFace to true which just use our font renderer and not the Firefox one.
Since I can't reproduce neither on Windows nor on Mac, I'm inclined to think that's an issue with the font renderer used by Firefox on linux.
I'd say that something is wrong with the hinting data in the font.
@jfkthame, wdyt ?