Rated 3 out of 5 stars

Thanks for this extension, it's simple but it works.
I hope it will be possible to do more customization. Like by authorizing some senders to produce an alert mail, and blacklist some others.

It can be interesting when you are in public or at work and a "Welcome to Meetsexfriends.com JudeLaw85 !" appears on you computer lol

But I don't know if TB allows such customizations.