The portable version of Mozilla Firefox do not work properly. some features not working, I tried with opera that works very well.
However, the non-portable version of Firefox works very well.
You are here
windows 10 32 and 64
What specifically isn't working as you expect?
I wanted, for example, to download an image from my google drive, it was not possible.
I installed a fresh copy of Firefox Portable 57.0.3, logged into drive.google.com, and downloaded an image from my Google Drive without issue. Please provide complete details including your full install path, whether it was a new install or upgrade, the exact process you are going through, the exact error you are seeing.
Thank you, very much, John T. Haller, for all the efforts you have made to answer me.
I have uninstalled, meanwhile meantime, PortableFirefox. I use, now, Portable opera browser that works perfectly.