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.