I'm referring to the "Unable to Connect" pages. On desktop, you only get a text error (no graphic). On Android, you get "Mr Lemonhead" 🍋 :
It would be cool (and seems more appropriate) to use a Firefox graphic/logo here instead. Remember this guy?
There was also this variant:
Chrome has this nice, simple graphic which is well known:
Anyways, just a minor branding thing.