Confirmation option when closing the window event if there is only 1 tab open

[capangel]

If I press X (close) button and multiple tabs are opened, I have a warning. This is fine. But if there is only one tab, the window closes with no warning.

The problem is I have sometime many windows of various programs opened, stacked on each other, and it happens that, when I want to close a windows other than Firefox, I click on the Firefox close X button and I have to relog in everything I was logged in.

I would like a simple check box to confirm the closing of the Firefox window even if there is only one tab opened.

Many thanks!

[Jon]

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[DearJohn]

I strongly support this feature request.

Accidental browser closure — especially when hitting Alt+F4 or clicking the close window button — can result in losing important tabs or interrupted workflows. While Firefox restores sessions quite well, there are moments (e.g. private browsing or unsaved form data) when that’s not enough.

An optional confirmation dialog (similar to the beforeunload event in web pages) would be a very helpful UX feature — especially for users who often have many tabs open or use Firefox in a kiosk-like or productivity-focused setup.

Ideally, this could be toggled in Settings, e.g.:
"Ask for confirmation before closing Firefox"
…and maybe even configurable based on tab count or session type.

This would not only prevent frustration but also show that Firefox cares about protecting the user’s session from human error. 👍