I use Firefox as my main browser on my Windows 10 Laptop. It has McAfee Web Advisor installed. About a week ago, I discovered that I could no longer login to my BT Yahoo Email Account using Firefox while McAfee Web Advisor was enabled. They'd worked perfectly together until then. Now, if I'm using Firefox, I have to disable McAfee Web Advisor when I want to look at my Emails. BUT if I use one of the other browsers I have installed, I don't have to do this. My other three browsers, BT Yahoo Email and McAfee Web Advisor continue to work perfectly together. Has anyone come across this problem and if so, is there a fix you could suggest, please?