Rated 4 out of 5 stars

Pros:
1. low Memory usage:
Firefox + Bluhell Firewall: 200MB
Firefox + ABP: 300MB
2. firefox more responsive, less lag compared to ABP.

Cons:
1. most blocked ads are international so it little chance to block local or country ads
2. no whitelists URL so you need manually click the icon to enable/disable
3. no personal/custom Filter

This review is for a previous version of the add-on (2.0.1-signed).