I had to update firefox to current version to pay a bill on a web site. I did it. I was recommended to sync another device during install, I did that too. I worked for a few hours on firefox just now, then it crashed. It reported data it had but now I have nothing. No history, no bookmarks, NOTHING. I logged in, my username and password worked find but it's like a fresh install, no data. Over 10 years of history, hundreds and hundreds of pages and passwords all gone. I synched to my phone as it insisted I install another device. Supposedly that was done but I have no idea how to use that or what it can do. They claimed it was a backup. I'm at a total loss. Andrew