Can't conmnect to Charles Schwab web site
When I try to connect to the Charles Schwab web site I receive the following message: "Service Unavailable The server is temporarily unable to service your request. Please try again later. Reference #6.3ebe1cb8.1630877135.11b83ed "
No problem connecting with Brave, Vivaldi or Chrome. Using OS 10.15.7 with a Mac mini (late-2012), Firefox 91.0.2
There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.