Rated 5 out of 5 stars

Wow! Immediate improvement. Slow loading of webpages leading to time-outs has been driving me nuts! I set this to "Power Settings" and whoosh!!!!!

Briliant!
Using FF 13.0.1 on Mac 10.5.8 (Leopard)

This review is for a previous version of the add-on (1.5.4.1-signed.1-signed).