Hi, This is since the last 2 updates. I usually maintain 2-3 active windows with multiple tabs. Everytime I turn off my PC, when I turn it on again, and I open Firefox, all my windows and tabs would be restored as I last left them. And if I accidentally closed the windows, I can select reopen Recently Closed Windows. But since the last 2 updates, after I close the window, the option to reopen Recently Closed Windows were still grey. And it's a hassle that every time I restart my computer, I need to go to Restore Previous Session to have my tabs open again. And if I or another user opens it and started a new tab/session without restoring, I will no longer be able to restore my previous sessions and would lose all my tabs. Can you please tell me why the feature is changes, and is there a way I can easily restore my previous sessions without the trouble. Thank you. Jennifer