I had same extensions running with Firefox in Windows 10 and I installed them in Firefox in Windows 11 and the icons do not show up. I installed/uninstalled/turned off the extensions and reactivated them. Nothing works. The icons will not show up and with one of the password managers the icon needs to show so that you can click on it and activate it. Also Malwarebytes Browser guard has the same issues. None of these problems occurs in Microsoft Edge. Seems Firefox is not ready for Windows 11 and I will not be able to use it as just too much work to try and rectify these problems.