'New chat msg'

[FatsXL]

This is constantly, annoyingly, blinking in my browser tab. I'm assuming it's a private chat message but I have no idea how to check who because there's no options for it on any of the menu tabs. There needs to be an icon somewhere on the interface that I can click on when I have private chat messages, or it shoudln't blink in my browser, but preferably the former.