Hello, I've been involved with system administration for more than 10 years now but I've never heard of this product. I checked it and it's actually a relatively new product. It seems okay, but it doesn't have wonderful reviews. I recommend you use [https://addons.mozilla.org/en-US/firefox/addon/adguard-adblocker/ Adguard] , they also have malware protection, and it's a much better option. It's also easy to use. If you want a little bit more advanced settings then use [https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/ uBlock Origin] , and enable malware blocking lists. They both provide great protection.(I recommend you only use one of these, and not both for performance reasons.)