''locking this thread as duplicate, please continue at [https://support.mozilla.org/en-US/questions/1046156 /questions/1046156]'' My husband and I used Firefox. We can no longer open the high school site for their abi. Its for the high school where we can log on and check grades, homework, attendance/tardies. It just happened the past week where we can't get on. We have androids and use Verizon.