This extension will slow your browser down like hell...! At one point I almost switched to chrome thinking it was firefox that was the problem. Firefox would take nearly 10 minutes to start after a few days of installation of this extension. And even after the browser has started it would take decades to load the site. And suddenly every thing started working smoothly as soon as I uninstalled this piece of crap. A piece of garbage is what it is..! This should be removed from the add-on store all together if not improved.