Installing Win portable apps from my Mac on my USB

Hallo all,

Sorry if this has been discussed before. I didn't find the discussion.
I have this problem.
At home I work on a Mac.
But at work there are Windows workstations.
I am allowed to run apps from my USB but writing to the stick requires encryption, which I do not want because the encryption program only works on Windows.

The portable firefox I am using is outdated by now and I want to have a new version but installing it at work is not an option for the stated reason.

At home I have NO windows machine, not even on VM.
Is it possible to install a new FF exe on my USB stick from my Mac??

Thank you for your replies,

Arnold