I love this extension, the best one I've tried, but the reason I only give it 4 stars is for the simple fact that if someone knowledgeable enough could clarify a topic well and that is if it is safe and only does its function and does not send personal data to another place. If someone does this research, can you send me an email to thenelzi7@gmail.com telling me if it is safe or not. Thank you very much.