Closing the last tab in a group closes the window (when other groups exist)

[aragilar]

Is there a way when you close the last tab in a group, panorama view opens? If this is supposed to happen, is there a way to see what's happening/not happening in the browser console?

[gabrc52]

I can confirm this happens. I came just to file this issue.

[mastacheata]

You can set browser.tabs.closeWindowWithLastTab in about:config to false. That will prevent Firefox from closing the Window when the last active tab is closed.