While the service this extension provides is indeed very helpful, the extension itself is in dire need of updating. Right now, it slows down Firefox substantially and hangs it up. I have stopped installing it on client's computers and will not be recommending it until this is remedied.
We're sorry to hear that! We made several updates and improvements to solve this issue. If you think differently we'll be happy to hear from you via https://support.mywot.com/
