StatusbarEx

[Soldier1st]

Is it a good extension to use? it allows you to monitor things such as: cpu usage/memory usage/network speed.

[steviem1]

I suggest read these reviews. https://addons.mozilla.org/en-us/firefo ... atusbarex/ look at the specs and what it offers and if that's what you want, download and give it a whirl, best way is to judge for yourself and if you find you don't like it, remove it.