Yes, I do. :-) That logo is the new logo for MDN, our network for developers at Mozilla. Since Stack Overflow is a resource for developers we see a direct connection to that. Also, we have different foxes for different products, so that would probably be confusing - rather have one consistent look.

I could barely recognize what that tag icon means. A small odd white shape on another odd blue shape. You can spot the Google Chrome and Android icons from a mile. Come on.