PDF preview fails in Firefox (works in Chrome)

Hi all,

I have this PDF that I added to one of my repos, and it looks ok in Chrome, but the first slides are not displayed in Firefox, only a few of the lastest slides are displayed correctly.

Does anybody know if this is a known issue, or maybe a mistake, on my part, how to fix, or where I can submit this issue?

Here is on Firefox:


I even can’t open it.
But I guess that is a difficulty of the generator of the PDF-File. Not a github issue


I was able to see it on DuckDuckGo on mobile and Edge. There must be an issue with Firefox compatibility.