This is not new. It's been there for donkey's years, and it even got through to Firefox.
However, Firefox took it one step further.
FF completes the addresses with the following top-level-domain extensions:
Who knows - there may even be more. I just haven't found them yet, though.
Discovered it on the last day I was at work before christmas. Been running round like a madman since then, though. I'll be glad to get back into the office for a break!
Anyway, hope y'all had a good one.
Just wanted to share.