Here's what you need to do.
1. Install it and use the web for some time.
2. Disable it temporarily and you will know the differenc, and how useful uBlock had been.

semoga aman

The best add blocker I Have found, Love it

¿Que quieres que te diga? Es el mejor bloqueador de anuncios que existe a día de hoy. Un apoyo tanto de los devs como de la comunidad hace que sea muy fiable a la hora de buscar un buen desempeño y seguridad.

♥

Well my browser suddenly slowed down - alarmingly so. I assumed it was my router, or my switch, or my modem or my NIC, or my cables, or my OS. Turns out it was the Malwarebytes pop-up blocker! I tried all the other "top" pop-up blockers but they are either slow, or quickly detected. and must be disabled or I could not view my favorite sites!

This add-on is super fast, clean and works transparently and amazingly well. I love open-source stuff.

Great job by the team who created this add-on! Highly recommended.