I've come on to my computer today to find that whenever I open Firefox it is now adding another Firefox logo to my task bar, under which the new window is opened. I really want the window to be under the Firefox that is on my taskbar already. Right-clicking on the original one shows me all the possible things, like opening a new window or creating a private window, that I can do at a click, whereas the new one only gives me the option to close or pin it. What happened and how can I fix it? My taskbar is already too full to have duplicate icons whenever Firefox is open. Thank you!