Yes! That did the trick. I should have thought of it myself…
Thank you again for your help! And I learned a thing or two along the way.

Using the extension, I can delete all items of the "imdb.com" Firefox cookie, except one (see screen capture).
This item does not appear in the cookies.sqlite file in the Firefox profile, if I open it with an SQLite editor. But it does appear in the cookies.sqlite file if I open it with a text editor.

No, I don't have this extension. And this imdb.com "cookie" contains 11 items, one of which is a tracking cookie, and 3 of which have an sqlite extension.

Thanks Russell. Still not perfect. For instance the imdb.com cookie refuses to be removed… I could also remove some cookies using CleanMyMac X, but still some cookies persist (such as imdb.com).

• Why would the removal work with the extension, and not with the "Remove" buttons in the application?
• Why would certain specific cookies not be deleted?

Yes, it seems to mostly work, although some cookies are still not deleted: e.g. Wikipedia.org, fujifilm-x.com, dpreview.com, imdb.com among others.

I don't understand the difference between the Helper and the extension. I have clicked on "Install" for the extension, but it is not listed in the Firefox extensions, only the Helper.

This is with Firefox. Removal seems to work for Safari.
I am using Cookie Helper.

I have tried uninstalling Cookie, and removing all files related to it, then restarting the Mac, then reinstalling Cookie. To no avail.

Removal does not occur, even after several minutes. Right now, for me, Cookie does not work unfortunately.

Well, now it happens again. I have a list of 52 domains (15 of which are favorites), 236 cookies, and when I click "Remove Non-Favorites" nothing happens. If I try to remove them one by one, sometimes it works, sometimes not.

Thanks Russell. Quick to reply!
No, I do have a valid license.
But strangely enough, Cookie does work again now (it removes cookie as expected).
Don't know what happened, except that I changed the country setting in my VPN, can this play a role?

Hello,
I noticed that Cookie does not seem to automatically remove cookies anymore (although all the relevant settings are activated).
Nor does it remove cookies when I click on "Remove Non-Favorites" or "Remove Tracking Cookies".
The only thing I can do is to select a cookie in the list, right click and select "Remove". It sometimes work, not always.
Cookie has full disk access.
Tried quitting cookie and relauching.

Cookie 7.3.6
Mac OS Monterey 12.7.6
Firefox 129.0

Thanks Russell.

Silly me… that was it, thank you. Safari does appear now.
However the DuckDuckGo browser is not listed, maybe it is not handled by Cookie?

Hello,
In the list of browsers on the left side of Cookie window, only the default browser (Firefox in my case) is listed, in the "Protected" area.
Below it, there is a "Disabled" area, but it is empty, although I have other browsers installed (Safari and DuckDuckGo).
What could be wrong?

Cookie 7.3.6
Mac OS Monterey 12.7.6