Okay, I can confirm that they appear in Chrome. Still not showing up in Firefox.
I'm using Firefox version 57.0.1 (64-bit) in Windows 10 Home.
Anybody else? Just me? Hmph.
Still there for me too.
The ‘like’ button doesn’t show on your own posts though, only other people’s (your attachment only shows your own post, which won’t have a ‘like’ button anyway).
Yeah, I did that screenshot to explain my "show off" comment. It's not meant to illustrate the lack of like buttons. The attached is what that looks like.