I've been using this a long time and it worked great....well maybe. Maybe it was causing my issues I had with FF. But one thing that continued to get worse, it won't let you turn it off. Not without a battle. You turn it off and it will turn itself back on. When it first started it would only take like twice to get it off, but now it took a good 10-15 tries to get it to stay off. I'm about to say goodbye this add-on.