It's good to know I'm not the only one with the issue!
I've tested it with the latest Firefox regular version, and the updated Chrome version too. Both don't show the icons.
I am wondering if its anything to do with using java? I've noticed that java doesn't update now. For the latest couple of updates it puts a warning that I won't be able to get the full advantages of the update unless I upgrade the OS. Now I get an error and it fails to install.
I've noticed quite a few things wrong with firefox in particularly recently. It doesn't play mp4 files through websites. The moving pictures/videos on twitter don't play (if I use Chrome they will).
I wonder why java have chosen to abandon WinXP people. Why is it even an OS issue? Does java install in a different way depending on the OS? It's disappointing.
Btw, I can see the icons using firefox on Win10, and also java installs fine too.