Q:

New Stack Overflow navigation bar?

I came across the new Stack Overflow navigation bar recently, using a mobile browser I rarely use.
I've never seen this design on my usual browsers.

Just to check, is this available on all browsers or sites?
Note: Not sure if it's only available on Stack Overflow, so I asked on Meta SE

A:

We're running a series of A/B tests with a new header/topbar nav design. Congratulations, one of your devices made it into the test group.
Currently this only applies to Stack Overflow. I don't know off the top of my head if we're intending to roll it out network-wide once the tests are completed (assuming we decide to keep the new design) or not.

