Zend certified PHP/Magento developer

Firefox (90.0)deleted from dock upon reboot in latest Big Sur

it seems that Firefox is not welcome after rebooting, have to activate (saved 90.0 download) and go thought reinstall and reactivate preferences. does not keep Firefox ready to use or DuckDuckGo and all must be reselected like its been rejected on reboot. Done many times before deciding to report.