I was trying to disable GMX email add-on which seems to be embedded permanently. I have found about every place on my desktop and on Firefox to no avail. Their page keeps coming up as the browser window. In the process, I have lost access to my Firefox browser window. I have followed all the instructions given (btw: Microsoft no longer has the "install any" notation shown on your sample App setting screen). Still no browser screen appearing even though the Firefox is on the preference list both on your site and MS app site. All the browswer files seem to be located under Setting: Applications: Firefox. So I have browser search ability right now without reloading Edge or ???. Your thoughts please. Carolyn Tompkins [email removed from public]