For sites I'm not a member of there are two issues with the top bar after.
Logo cut off and white space on the right
I don't see this problem on sites I'm logged into:
When I scol down on sites I'm not logged into the headline vanishes a tiny bit earlier than the search field. This leads to situations where the headline is already away, but the search field is still there:
Again, this does not happen on sites which I'm a member of.
I'm using Firefix 52 ESR