Firefox sync issue

I keep getting a message saying can't sync. I also got an email saying my account is about to be deleted for non-use you mush sign in to save your account. Firefox is already signed in to i took that as a scam and deleted the email. but when i click on manage my account within Firefox it loads a page that says: "Session Expired Sorry, something went wrong. Please sign out from the browser menu and try again." Is this also a scam? I do not trust much of anything on the internet anymore, it seems that everything is a scam these days. Also how do i change my primary email address? My current email address has been getting attacked a lot lately. Thank You.