It happens all the time after Microsoft's update or upgrade, when I have many tabs open in Mozilla browser, after the update all tabs I can not restore. WHY??? In dumb google search engine it does not happen. Why does it happen in Firefox??? All opened pages should be stored in computer somewhere ? Please explain, why I loose all tabs that has been opened previous to any dumb microsoft updates? And I can not restore them because the restore of the previous session is grayed out. Total crap, isn't it??? Please explain why. I have just downloaded another browser. If this one is going to work better than Firefox then I will stick to it. I am waiting for your prompt reply as your browser user. Regards, John