Hidden Windows Scare me

So I was messing around with twapi on my laptop and noticed an oddly named window. It was filled with question marks, like the encoding wasn’t working. Then I ran twapi::show_window on it (and all other hidden windows), and the result was some sort of hidden window filled with Chinese text.

Upon further experimentation I found it only shows up when I log into gmail, either via my ASU account or normal gmail accounts.

Meh… virus? I tested it on other machines and didn’t find the window. Looks like something hooked into Firefox and is launching whenever I view my email… joy.