Does this happen when accessing Firefox from a desktop shortcut?

If so, the profile manager option might have been enabled on that shortcut for some reason. To solve it, right click on the shortcut and select Properties. In the Target text box, make sure that there is nothing after the quote at the end of the target.

Hope this helps.

Thanks for your replyWesley, yes i am using a desktop, have copied what it says in target....."C:\Program Files\Mozilla Firefox\firefox.exe" Is that wrong or no?? Thanks.