Rated 5 out of 5 stars
as *many* have said here, great add-on and why isn't this in FF already ?
I use both Chrome and FF in my triple multi-monitor setup, and i LOVE the way Chrome has it's own "Task Manager" (seriously that's what it's called ! OPTIONS>TOOLS>TASK MANAGER) where i can see detailed data about memory, CPU usage, GPU usage, bandwidth, etc for chrome tabs *and* extensions, etc.
this add-on goes some way to providing users with a way to measure and manage their resources, but it's something FF should have built-in, just like Chrome already offers it's users.
thanks for the great add-on :)