I use a very extensive tree of shortcuts, all branching from my Firefox menu-bar. it gets quite annoying and surprisingly disheartening, when i am navigating my tree, to get six or fourteen levels deep, every step of the way WALKING ON EGGSHELLS not to let my mouse pointer escape the confines of the deepest level I currently have open, only to slip-up, let my pointer slide onto the currently-open web tab beneith, and then watch all my progress through the tree simply evaporate before my eyes informing me that I am now privileged, once again, for the eleventy-seventh time, to navigate my tree once more, rather than address the issue I had had on my mind way back when I could remember what it had been. Symptom: Open a shortcut folder from the shortcut bar. Select another folder from that menu, Let the mouse pointer slide off the current open menu. ==> All shortcut menus currently-open close. Thanks for looking into this.