Firefox 131, btw.
To replicate this bug,
go to https://www.st.com/en/microcontrollers-microprocessors/stm32f091rc.html#documentation
tap-hold on one of the documents there,
download link..
Where is it?
It isn't in Downloads..
Firefox says it was downloaded successfully..
OK, so what happens if I Open it?
It opens!!
So, it's saving it to its cache,
& calling that "downloaded", or something??
It's bullying/wrong/abuse, is what it is.
BTW, it doesn't matter if I've tossed all my apps, then rebooted the tablet,
nor does it matter if I toss Firefox & on restarting it just try opening the document in a different private-tab ( open link in new private-tab ), then use the Download button in the top-left:
FF's still fucking me over for the documentation I'm trying to get.
It does seem to be a Heisenbug, intermittent & .. not obvious what the hell the key is, to make it predictable..
Last boot-session it had allowed me to get the Specs .pdf,
but then none of the Application Notes ( damn ALL of them ) appeared in the Downloads folder, when I checked..
Maybe it's seeing if the file has EVER been downloaded, or tried-to-download, & if so, it's vetoing my getting my hands on it?
( if anybody cares:
the Nucleo-64 boards that "Bare Metal C", a NoStarch Press book, works with, apparently include the Nucleo-F091RC board, which may be more powerful than the board that "Bare Metal C" was written for.
https://nostarch.com/bare-metal-c
I can't remember the details, but this particular board should be compatible, and have more memory, at least.
This microcontroller is the one on the Nucleo-F091RC board.
That is why I want to be reading the Reference Manual & the Programmer's Manual, & all the Application Notes for it..
Someday I'll be able to afford the hardware, too.. : )
PS: If this community wants my bug-report deleted from here,
( & obviously Mozilla removed their bug-reporting feature from Firefox/Android, to eradicate bug-reports from Android FF users )
then remove this, & that's fine.
I've no problem with either way:
world wants it gone,
XOR world permits the bug-report to exist.
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I can't follow your train of thought completely, but downloaded PDFs show in the download folder for me on Firefox mobile. What version do you have?
As I said, 131.
Also, I didn't remember to mention, that FF isn't putting entries in the Downloads listing it keeps,
either for the .pdf's successfully-downloaded, OR for the ones it hides.
Oh, another point..
It seems that some tabs ( not on the same site: haven't tested that, yet ) still download files, but other tabs only fake it..
_ /\ _