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?

There is no other way for me to open 20 youtube tabs without lagging.

Simple and works well, loaded with settings/preferences so you can really fine-tune it's behavior the way you want it. Awesome!

Works super well, makes my Mac run 10x smoother on heavy browser load.

Game-changer - transforms the performance of my high powered laptop (128GB RAM)

Works, but if I maximize/fullscreen a window over discarded tabs they all release when that window minimizes/resizes

Good extension for suspend tabs, like it~~