Hi there, sorry to hear you're running into trouble with your MozBar! We've got a couple different things you can try. The suggestion below is definitely something worth checking out, you may also want to try uninstalling and reinstalling the add-on. We have also had some reports of an intermittent issue with the data showing up which might be the cause as well. Go ahead and try the reinstall, I'll get you added to the ticket just in case as well and if there are any updates I can submit that information to you that way!