User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:39.0) Gecko/20100101 Firefox/39.0 Build ID: 20150630154324 Steps to reproduce: Opened a regular Firefox window with a few tabs and then opened a new private browsing windows with one tab. Then I pressed Command-Q on my Mac Book while the private browsing window was open. The browser quit (both the normal and the private browsing window were closed) without any warnings. Actual results: Browser closed/quit without any warnings, even though there were multiple tabs in the regular browsing window and I have default settings (i.e. the 'warn on closing multiple tabs' setting is turned on). Expected results: There should be a warning about closing multiple tabs.
Same bug as 952925, only this one is happening on Firefox 39.0 on Mac OS X.
Component: Untriaged → Private Browsing
I suspect this is related to bug 1188732, since both seem to involve unexpected behaviour when closing the last private window.
Did this used to work in previous versions of Firefox?
More specifically, in which version did this stop working? :)
There might be a related issue I'm having with Firefox 58 Dev Edition. When two Private windows with multiple tabs are open, closing the second window doesn't prompt with the warning dialog for that window. The dialog appears properly when only a single window with multiple tabs is attempted to close.
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