It seems to work alright, if only lightening the memory load a little bit. The big issue is that it doesn't seem like it's in active development anymore; it's been 5 months since the last commit to the repo, and Firefox-specific version of this extension is a few years old now. It might be best to just ask Mozilla to implement this kind of functionality directly.

1 Star. Breaks random websites for no apparent reason, i.e. they don't work anymore at all

This add-on saved the day. My mac fan automagically stopped spinning.

It's very great, but I just wish it could close all the discarded tabs automatically (if possible)

rất tuyệt với!

Might have left Firefox without this.

It doesn't work anymore.

excellent context menu integration

simple and easy to use

Not sure whether it is working or not.
Even after discarding most of the open tabs
(~150 ), I couldn't see any noticeable memory usage reduction....
Could someone give some numbers (bytes or percentage)
of memory amount recovered after discard of a (big enough,
for to be trustworthy) number of tabs?