Is there a way to get Safari to warn that there are multiple tabs open, so that closing one doesn't close them all? Before upgrading to Mavericks, I used to get that warning.
I read: A work around might be to click History from the Safari menu bar top of your screen. From the drop down menu click Restore All Windows From Last Session.
Unfortunately, Restore All Windows From Last Session is always grayed out and doesn't work.
What can Apple be thinking when it deletes what is needed? Every new OS version seems to eliminate things from previous versions.