I found it not very useful as it doesn't discard tabs just marks them as inactive. That however isn't the issue. Upon removal it forces you on addOn.com for feedback and opens a tab with this which I find hugely invasive and quite bad taste.

thank you

Great! Saves a lot of computer's memory. As well as helps you decide to just close the tab that has been discarded for a long time :-)

Simple, easy to use, easy to add exceptions to the discard system, or whitelist, all of that. Easy recommendation from me.

Does what it says it does and does it really good.

I'd like to rate this add-on more highly but the first option worries me greatly: '..also >trash< all tabs not active in the last 24 hours'.
Can this be serious? 'Trash' to me, American though it is, means wreck, destroy, obliterate, smash, demolish, vandalise, eliminate, break apart, disassemble with prejudice, make useless for evermore, effectively kill...
Would I want this done to tabs I've had sitting in my browser for more than 24 hours? For any number of hours? That seems absurd.
I'd like to test it, but why would I want a terminal sentence passed on any of my tabs?
Maybe it's just a poor choice of language by the author; very poor, careless.

Great in almost all ways but I would like the creator to add a feature that allows specific pages to never be discarded while other pages of the site is still discarded. (Example: example.com/example isn't discarded but example.com or example.com/example2 is)