Running on Windows 10. Got message that new version was available and clicked download download. Exited Firefox. A few minutes later, I clicked the Firefox icon in the menu. I got a full screen gray box with a few shadow lines that would probably be menu bars. No images showing. Repeatedly get "Firefox is not responding" with close Firefox or wait. I click wait and nothing happens. It has a spinning progress icon but no activity. Task manager shows 0% CPU, Disk and network, and 10.1MB Memory. I rebooted the computer and get the same result when restarting Firefox. I suspect a bad image was downloaded that corrupted Firefox and I don't know how to recover. I hope to be able to access the tabs I had open before the update. Any suggestions? Thanks Richard Flowers