I have win7 with firefox pinned to the taskbar. Whether I have one firefox window with multiple tabs, or multiple firefox windows each with multiple tabs I still only get the one layered icon in the windows taskbar showing all the tabs on hover as if they were in the same window. I want a separate icons on the taskbar for each firefox window, and for each of those icons to retain the current behaviour of showing the tabs within the window when hovered on, but ONLY for that specific window, not all the tabs across all the windows. I could just use separate browsers altogether to achieve this (or will firefox support multiple instances with some hacking?) but I want to do this properly.