Great extension. It does exactly what you'd think it does. Nothing more, nothing less. Just how I like it.

My only suggestion to the developers is to allow users the ability to move the box, or have it autohide after X seconds. I just want to glance at the word or character count, not have it stay on my screen at the top right corner where I might accidentally close the browser instead of the Word Count popup box.

EDIT: okay, it did autohide for me, but it was more like 10ish seconds rather than 5. Regardless, this extension still does exactly what it should, so I will continue to use it.