I've been out of town. After returning home Firefox updated to 127.0.2 but now it will not close its process when I close its window. When I try to launch Firefox again I get the error message below and attached: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window. <Close Firefox> <Cancel>" When I select "Close Firefox" the new Firefox window will then launch. However, if I open any web page the same error occurs after closing the window. If I launch Firefox and then close it without opening a web page I do not get the error the next time I launch. Somehow going to any web page in Firefox prevents that instance of Firefox from closing. I'm running Windows 10 22H2 Build 19045.4529 and it's shown as up-to-date.