Very much appreciate your taking the time to follow up on this. After quite some struggles and hesitation I've gone ahead to re-install Firefox.
Having done so, I'm am now no longer able to observe or reproduce the issue reported. In answer to your comments: - I never get a warning when closing normal window with several tabs open, only when closing private windows with multiple tabs. (which appears to be the opposite of what you are seeing) Noted that this has been an on-going inconsistency in implementation requirements/intentions from Mozilla. - 10 minutes is more than enough to have observed the issue. I believe this issue should therefore now be closed here. If it does re-surface in the future, I will re-open it. Thanks. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1794282 Title: warning dialog when closing multiple private tabs can become unresponsive Status in firefox package in Ubuntu: Incomplete Bug description: Affecting Firefox 60 with Ubuntu 18.04.1: (Private Browsing) When closing down Private Browsing with 2 tabs or more, the 'warning' dialog box appears but if no selection is made after a while, the 'Gnome' dialog box appears behind it incorrectly indicating Firefox is 'unresponsive'. This causes the application to freeze as no selection can then be made as the 'Gnome' dialog box's selection is hidden (inactive window) behind Firefox's 'warning' dialog box (active window) which has now frozen (...awaiting the 'Gnome' dialog box's selection which cannot be made!) Thank you for passing this on to the appropriate teams for action. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1794282/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
