We use the Guest User to login to checked out iPads to students. We are using Macbook Airs with the M1 chip. When trying to use Firefox I received the error message "you don't have permission to open the application". I received this message for Google also. So I uninstalled both apps under my admin login and reinstalled with the latest versions. I also updated the MB Air to the latest Big Sur version. Google was able to load without a problem. Firefox on the other hand will not load. It bounces once in the dock and then doesn't continue to load. I logged back in with my Admin user and changed the permissions to see if that worked and Firefox still won't load. So I tried to lower the Security setting for the MB Air and that also did not work for Firefox. Any suggestions on what else to try? Thanks in advance.