In Chrome - I have had a problem with "err_ssl_protocol_error" which did not occur when I disabled bitdefender. (Also had problem in Firefox.)
I've seen proposed solutions that suggest unchecking "scan SSL'" in bitdefender - but I cannot find that option anywhere. Others suggest locating it within a "module" -- but I see no reference to any "modules" in the very simple bitdefender interface to which I have access. (I've seen more comprehensive screenshots of interfaces -- but I don't see any way to access them.)