I used to be able to click the red X in the upper right hand corner, receive a pop-up window warning me that I was about to close all open tabs, and then click yes or OK in that pop-up window and then have the entire window (with all open tabs) close. Thus exiting out of Firefox. Now that I have updated to 48.0.2 this no longer functions the same. Now, when I click the red X, the tab furthest to the right closes.. if I click the X again, the next furthest to the right closes. This is ridiculous. How do I get Firefox to respond correctly to what the red X is supposed to mean.. it means close the window and warn me about any open tabs! Any help will be MUCH appreciated. If it matters, I am running Firefox 48.0.2 on Windows 7 Home Premium.