I sometimes download PDFs on libgen and sometimes Firefox will acuse them of being malware with the advice "this file contains virus or malware" but gives no details. I've run several of these files through virustotal and none give any problems in any of the scanners.
Some of them are djvu which I presumed was only a format to hold static images with no interaction, so it'd be much harder to host a malware. So is there a way to know what is firefox finding in those files?
Is firefox somehow better than all the antivirus tested on virustotal?
If someone wants to test some file please let me know so I can send the link