Amazing add-on! Lots of options to customize it to your liking as well.

Literally saved my laptop. Now I can continue hoarding tabs like I usually do without the laptop slowing down to the point where it would take forever to do anything :D

Update request: Ability to whitelist domains to never suspend. I like that I can not suspend pinned tabs, but I only pin a few tabs regularly and forget on others that may need to stay active.

Love this Extension. I like to keep tabs open as I switch between many tasks throughout the day, and keeping the tab open reminds me what I haven't finished yet! The company wont give me more RAM, so this is a great solution to the performance issue having 25 tabs open can cause!

how i can enable favicons, with this small image much easy to navigate tabs, if i cant do this, add this in new version please :)

This is a must-have for Firefox.

Simple, effective, reliable. Does one thing well, just like tigers like it.

Memory saving, Life saving!!!
I use lots of tabs, due to the excellent TreeStyleTab, so Firefox easily eats 3GB of memory. With this extension I get usages of 1 to 1.5 GB, without any noticeable loss of performance.

Very helpful

Great extension. Like a buddy said in his comment below, that feature should be included by default (with all options) on browsers. Just a little nasty bug: sometimes when you use the context menu "Open Link in New Discarded Tab", when you come back to that tab, it doesn't load automatically neither it gives the option to refresh. In both cases, you lose the link for the tab. An temporary solution I found is trying add it to bookmark. The bookmark mini-window will show you the URL. Then you can copy and paste and go.

Excellent Firefox Extension! Just made a donation.
Since using it, my Macbook is consuming less CGP, which benefits battery and therefore also the environment.
Small steps that also count on the path to a more sustainable future.