I received an error stating that "Firefox.exe" could not be found when I logged into Windows expecting Portable Firefox to launch automatically. I added FirefoxPortable.exe to Windows startup folder. The error recommended me to reinstall Firefox but I had no problems manually launching it.
the firefoxportable.exe is the launcher, if you just place it into the autostart, how should it know where the rest of the firefox is located?
If you have all installed on your hard drive, then you could try to make a link to the firefoxportable.exe and place just this link into the autostart.
Otto Sykora
Basel, Switzerland