firefox 100.0.2
I set up a temp dir in about:config browser.cache.disk.parent_directory /data/Firefox_temp At no point did I see any activity there but if I empty that directory then FF creates it on launch, so it knows about it.
Here is what I do:
Open the URL http://www.gnu.org/software/gzip/manual/ Click on PDF file (304K bytes) A popup asks "What should Firefox do with this file?" - I have "always ask" set for this file type in Settings/General/Applications at this point I see a new file in my home directory -rw------- 1 eyal eyal 308839 May 14 17:33 _qBdbX0t.pdf.part I now select Open with xpdf and click OK The above random file disappeared and another file appears -rw-r--r-- 1 eyal eyal 308839 May 14 17:33 gzip.pdf I now close firefox and this file remains. I restart FF and it is still there.
On another machine the file is created in ~/Download.
How do I get FF to use the nominated directory?