on FF.net I have a single message in my inbox. It has been there for the larger part of ten years. 

I check my inbox. It’s pretty full with messages I have answered for many years… but the unread message doesn’t show. It hangs out there, a single solitary number (1) next to my inbox, taunting me. 

I have opened every. Single. Message in my inbox. There are hundreds. 
The number one does not go away. 
It stays. 
Resolute in it’s destruction of my sanity. 

….I’m annoyed. Can anyone tell?