Downloads create zero-size file using Firefox

[robotsneedhugs2]

I had the same issue on Windows. Not sure how it works on Mac, but updating the Dokany Library to 1.3 (uninstalled 1.2 first) with the latest Cryptomator installer fixed the issue.

See this solution in another thread:

Renamed files after download in Firefox

Every time I read that some file management behaves weird, my first though is: "does he/she use dokany, and does he/she use the latest version of it (1.3.x)? And mostly every time the answer was “yes and no”, an updated of dokany solved the issue. Maybe it works for you as well?