Lets me set a keyboard shortcut to unload a Tab, like Alt+W, and switches to an active tab when doing so and when an active tab is closed it moves to active tabs only. Perfect!!
I also added a dot indicator and desaturation+low opacity in my userChrome.css file for unloaded tabs. Love it!

No way to set the delay time before the tab unloads. At least none that I could find.

This is the exact functionality I was wanting! Nothing more, nothing less - does the job perfectly.

Great! I can unload current using tab by using hotkey. Also able to unload other tabs except current tab.

works only for PER TAB basis, where the user can unload SINGLE tabs, one by one!

can't be used for multiple shift+selected tabs, which completely misses the point of temporarily removing whole window of open tabs from RAM when doing other kind of research in another window

it's actually much simpler to create a new folder for bookmarks, drag all the tabs there, and then close the tabs instead, which will completely remove them from RAM

Firefox has its own Tab Discard feature, if you dont have little RAM, dont use "Auto Tab Discard" or others.

But this is really useful, mainly when having bad internet speeds

One error for when there's no loaded-tab to switch to, allow app to open 'New Tab' and switch to it as default behavior. I believe adding this functionality would really make the extension nicer. Otherwise, the function is very nice to lower browser resources, I use it often!

Excellent. Frees up memory and CPU by unloading the page and its active assets, but keeps the tab in the list. Prevents Firefox from focusing the unloaded tabs well enough but sometimes Firefox does what it does.

I regularly have 50+ tabs open. Since Big Sur, being able to unload tabs makes the fans run quietly.