I have recently moved to firefox after being a chrome user for more than 6 years. Everything is fine but there is no option to unclose a window in firefox. I usually work with 20-30 tabs at the same time and to close a tab I use ctrl-w. But sometimes, I hit ctrl-q which closes the entire window and it just makes me feel like I should move to chrome again. In chrome, even after I closed the window there was an option to restore the closed window. In firefox there is also an option, but it doesnt work if you were working with only one window. My only wish in life is to change the keyboard shortcut ctrl-q to something else.