Firefox 124 improved on Android and Macs plus adds keyboard navigation of PDFs
theregister.com
theregister.com
But... Really? I have never seen a single one go awry and for me it works better than Okular, Evince, etc.
I routinely use it for completing electronic forms now, to the pleased surprise of the agencies issuing them. A typed form is always more readable than a hand-written one.
Do you have some examples or steps to reproduce? Can I help with filing a bug?
Are the documents you have issues with generated by some strange industry-specific software per chance? I've seen issues with output from CAD software and some cursed proprietary measurement equipment for chemical labs, but it's been many years since I found an issue with an "everyday" PDF (excluding those interactive JS forms that just yell at you to use Acrobat).
Assuming that guess was wrong (and it almost certainly was): would you mind giving me/us a copy of the PDF file where you experience this?
This sounded related to https://bugzilla.mozilla.org/show_bug.cgi?id=1767925 and the workaround people suggest (there and on reddit / launchpad / etc.) while talking about it helped.
No no Helvetica (had to check b/c I had Helvetica for decades on my computers)
[Edit] Hmm I have a Win machine and the bug seems to be about Linux?
Regardless, if you can give me a PDF file that experiences the issue I would be happy to try to get it fixed, as we shouldn't be sad at Firefox for a bug they aren't fixing if they don't yet have it filed... once it is filed, then we can be sad, as it almost always takes them years to fix anything (if they do at all ;P).
FWIW, though, you'd made it sound like this happens to you a lot... if this is really just happening to your PDF of your book generated by some weird website I've never heard of that is generating PDF files with their own code, it is quite possibly a bug in the PDF file and maybe it makes sense to fix Firefox (especially if it really is a font routing bug), but if the PDF file is sufficiently broken there should be some threshold for claiming it is a bug in the file, not the renderer.
Or that you can't have more than 8 tiny home screen shortcuts at once, even on tablets - similarly to Chrome, probably for the same reason that you still have space for advertisements from Mozilla.