cba to read cookies reply to you atm(it's late), but:
quote:
it didn't seem likely that it was from a browser.
lol?
Also, in what way does it look like a Plus! toast? it's in the same place? Yeah, it's also in the same place as all Windows notifications and many other applications, as well as being the place where you get lots of pop-ups in your browser(unless you're running a decent browser and ad blocking addon).
Not to mention, the most common thing? You're all Canadian.