[xoxoxoBruce]

That doesn't look like any of those items to me, but you're probably right.
Lemme check.

It shows up next to only 8 out of dozens of bookmarked sites.
In IE-10(not windows 10) it shows the IE symbol on the same 8 sites.
In Chrome, with all the options except spell check turned off there's no change.

I still think it looks nothing like a Star, Clock, Glass, Globe, or Box.
Hmm... I guess it could be a lens without a frame? But that's turned off??