On a whim I turned off "Open new windows in a new tab instead" thinking it would solve a different problem, which has to do with new windows and/or other features not opening on sites where the coder uses '#' to hide whatever could be opening up when a menu within a page is clicked (a javascript, jsp, php, or other -ism)... it revealed that the hidden bottom scrollbar can STILL hide under the taskbar, about which <a href=https://support.mozilla.org/en-US/questions/1092309>I've complained before!</a> Unbelievable. dL