I find this extension extremely helpful. I was looking for an extension where I could block certain keywords online like this and this is exactly what I wanted. I keep my emails private and most sites display it for me, making it harder to take screenshots and harder to not show it. Being able to hover over/click the keywords to reveal them is such a useful feature.

Recently my browser has been slowing down and firefox says personal censor is the cause, even if there's nothing it needs to censor. This is really suspicious and I don't really trust it.