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Close Browser Prompt Gone?

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I've noticed lately when I close out a session with more than two tabs active, that I no longer get the prompt asking me if I'm sure I want to do that. This is incredibly helpful if for whatever reason you accidentally hit the "x" in the upper right-hand corner. Is this no longer and option, or has the default simply been changed for the prompt?

I've noticed lately when I close out a session with more than two tabs active, that I no longer get the prompt asking me if I'm sure I want to do that. This is incredibly helpful if for whatever reason you accidentally hit the "x" in the upper right-hand corner. Is this no longer and option, or has the default simply been changed for the prompt?

Chosen solution

Type about:config<enter> in the address bar. If a warning screen comes up, press the I Accept the Risk button. At the top of the screen is a search bar. Type browser.tabs.warnOnClose and set it to true

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Chosen Solution

Type about:config<enter> in the address bar. If a warning screen comes up, press the I Accept the Risk button. At the top of the screen is a search bar. Type browser.tabs.warnOnClose and set it to true

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Thank you. So this was removed as the default setting in recent versions of Firefox?