I think this is not nessecary on Desktop, the "Data protection-Cookies and Website data - Manage exceptions" should deal with that.

Essential on mobile, to delete all cookies apart from selected sites. I integrated it to my custom addon collection

https://addons.mozilla.org/de/firefox/collections/17446767/Fenix-Addons/

it works pretty great! The UI is usable although a little small, and Addons are able to modify cookies and site data on Firefox Mobile.

A mobile interface with bigger buttons would be great.

I will ask the developers to add the addon among others to the official list.

Problem is - it does not delete any cookies. After enabling on-leaving for the domain, and closing the tab. And exiting the browser. And again closing the tab. The cookies, per Mozilla, all 10 of them from the domain are STILL THERE. Makes this useless.

DO. NOT. USE! It hasn't been updated in 3 years.

No way to change settings on this thing. no icon, no link. nothing.

This functionality of this addon should be natively in firefox. It used to work well. Unfortunately i had to uninstall it on recent firefox since it was was blocking sites after loading for a couple of seconds.

This extension used to be great, but after the author iced it (https://github.com/Lusito/forget-me-not/issues/288), and later, when the extension started causing problems with cookies / local storage for all sites (by itself or in combination with some other extension), I had to remove it. Hopefully there will be a return some day.

ghfgf

Good idea, but I can't see any deleted cookies

Is this app abandoned? I would pay a modest subscription for this app. The interface and execution are great.

It was a great add-on, but since its development by the author has been terminated, I do not recommend installing it for new users.