The extension is great (a good way to avoid the use of signatures), but I find a little weird how it displays on you own user profile (when you check it yoruself), once you have set some buttons:
While other users see that:
As users profiles are usually not visible for offline users, members will have absolutly no idea how it renders for other users, if it worked, etc. I can only check it here because i have a test profile on my forum.
Wouldn't it be more pratical, when you read your own profile, to display it for instance like that?
(note that i used a little css on this, so the exact aspect won't be the same for everybody)