For well over a year, I can no longer hover my mouse arrow over a senders info in email...

For well over a year, I can no longer hover my mouse arrow over a senders info in email (hotmail.com, or even in my Gmail acct,) and find the actual email sender information. I have tried right clicking the mouse button while over the email sender info, with no result. I use Win** on an HP laptop w*AMD ** CPU.(always updated). I usually access email by clicking on the email icon on my home page. I have also tried accessing email by using my Firefox broser to access Microsoft.com sign in. It opens Outlook.com, I login, etc. I still get the same result, no info. In this era of hackers, I get several suspicious emails almost daily that I will not open, for fear of being ransomed, or hijacked, or virused. *So how can I get to see the actual senders email info???*Thank you