I had to do a reset on Windows 10 Pro. I reinstalled Firefox. When I sync, my logins come back but none of the add ons. I try to manually download them and I get a message that says there is no connection. I have turned off all AV and Firewalls, refreshed FF, rebooted, uninstalled and reinstalled. I have Done all the malware/anti-virus scans just to be sure also. cleared caches ect. Update firmware on my modem and router to no avail.