While looking through forums,I read about a problem I also have with my usb protable firefox.I have a developed firefox,bookmarks,plugins,add ons, theme etc.Lot of time. Exit mozilla firefox,remove safely usb. Later plug in usb start mozilla firefox,only to see that nothing remains of my development. Profile setting all erased,or not remembered. FF126.96.36.199,the most recent. I have more than one usb with fire fox,I do not want the up date if this is what is going to happen. There is no stopping the up date.It is automatic,which I think is a mistake. An other problem is fox fon,I paid $5.00,made one call,then I could not access the foxfon again,I would type in the correct pin and pass,and soon as I click enter,the password would double,need I say the password would be wrong every time.I did not get the use of the foxfon nor have I recieve the balance of my money for the service. all in a day,whats next. someone left out the dna for this firefox.