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.

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.

until now I´ve used "Cookie Quick Manager" which sadly seems not getting any further development. So I´ve switched to "Vergiss mein nicht" since a few weeks, and on the whole it´s an easy to use, innovative AddOn.

But something is nevertheless going wrong here, bc every few days some with "[N]ever" protected cookies and their stored website-data are gone and I can input every website-specific stuff once again. Any possible other, auto-erasing possibilites, cache-cleaner etc. are disabled here.

With "Cookie Quick Manager" that -never- happened, secured cookies were reliable stored over -months- there. So I´m clueless and not really happy with this AddOn right now. :(

Does not clean cookies from some sites. Heavier than others 1.9 MB vs 700KB, Needs a lot Permissions

Vergiss Mein Nicht - Vergiss Cookies und mehr:
Option: Delete Cookies an Tab Close ?

There are a lot of settings and I did my best to be logical when I went through them. Most importantly I assumed that if I mark expressions "Never" they will not be deleted. Not so unfortunately. I keep getting messages at the bottom of FF that so and so cookie has been deleted, even though I marked them NEVER. That is a major nuisance, so I've had to disable it for now.

Non functional (no icon anywhere but a pop-up message showing)

Does not clear Service Workers on domain change; did not remove localstorage, nor all third party cookies on domain change in my testing.

COME ON FIREFOX, please improve your APIS to allow us to inject, modify, and remove all forms of storage!

Seems like a very good addon for what it can do, but I found the interface to be a little overwhelming. I needed something simpler.

cant use mouse for clicking on loading websites, even already loaded. disabled it and web works. It uses a lot of CPU power because of all action it records and controls. a bit to much -using *another program* and web works. Idea for program is good but it must be more optimized (mem leak and algo)

It's goods enjoy

just beginnning