Rated 1 out of 5 stars

Shows that Firefox and installed add-ons are using far less memory than they actually are.
You'll just have to check memory usage the old fashioned way:
Disable all add-ons & restart Firefox, then open Task Manager (ctrl+alt+del) and monitor the memory usage of firefox.exe as you enable your add-ons one-by-one (I recommend restarting Firefox after enabling each add-on, even if the add-on doesn't require a restart).

This review is for a previous version of the add-on (10.1-signed.1-signed).