new window causes firefox to load blank profile

when opening Firefox in a new window when one is already open by right clicking on it`s taskbar icon, clicking on new tab or the firefox game, causes a new window with a new profile to be read, using about:profiles shows that it is the only profile when in reality, my profile is the only one.

running windows 10 (version 1803, build 17134.766) 64 bit OS, install path is C:\Users\username\Desktop\files\PortableApps\FirefoxPortable, OS was restored.