I am not sure how Mozilla can recommend this.
This extension is broken in so many ways.
There are many thread about failure and inability to delete cookies.
There are also threads showing it is broken when it comes to edit of cookies (can't even change a session cookie to expire on a specific date.
This addon is only good if you want to view your cookies.
This addon is WORTHLESS as a Cookie Manager.
This addon does not allow managing MOST cookies and instead treats them as read only.
This addon is a failure compared to the addons it claimed to be inspired by.
Further the support has been non-existent.

What criteria does Mozilla use when recommending addons that they would recommend this BROKEN and INCOMPLETE excuse for a cookie manager.

poor first experience, can't even import a SINGLE cookie this extension should be removed from firefox addons

Found out the hard way that "current Context" is the same as "Delete all cookies for all websites" so 1 star. I am only rating it 1 star because I don't know how to rate it lower. (If I wanted to delete all cookies for all websites, I don't need an add-on. Firefox already has that option.)

Udvalgte cookies bliver ikke slettet. !!!

This no longer works in Firefox 86.0 64-bit on Linux as of at least this week (1st week of March, 2021). Many cookies are left after clicking "Delete Current Context Cookies." The only way to clear the cookies is to restart Firefox.

I dont know for what such high marks, but simply I couldn't add cookie at my site. I can change cookies but I have to add. So "remove"

I tried to protect some cookies. Then, in Firefox 78.0b7, when clicking " Cleaning Data", all cookies are deleted even so-said protected.

Doesn't allow you to create cookies.

Can I toggle cookies on and off on this app? It didn't state whether that functionality was possible specifically in the spec.

I tried to use it for only one function - to block the change of a certain cookie. Seems it allows you to do this, "Prevent sites from clearing protected cookies, even if they are expired" is enabled in the settings, but cookie still changes.

Doesn't work, clicking on icon just shows a popup with a list of cookies but clicking on anything does nothing, absolutely useless.

Extremly useless. Bad user interface. Filter for domains is not prefilled with the one of the current tab. This is a really bad extension.

EDIT: The problem in your link is a different one. The addon works. I can view and delete cookies but when I open the extention I want to see all the cookies of the current domain. I don't want to filter manually.

Ужасный интерфейс. Программа просто удалила все мои куки и не дала с ними ничего сделать. Бэкап? Пфф, бэкап для слабых!