(From the perspective of having a low budget, pre-built PC with a dedicated GPU. Disregard for mid tier and better PCs.)
Works as intended, I'll give it that. My issue is the amount of CPU usage added (+10-30% on a G3260 dual core while watching a YouTube video compared to without the add-on), and RAM usage added (roughly +200 MB of RAM usage compared to without the add-on), it really just isn't worth it. Made YouTube regularly skip and stutter video frames. If you're like me, and see your computer as "the little potato that could", you'll be hard pressed to find an anti-virus that doesn't beat your browsing's performance like Rocky beats his meat.