Welcome to Firefox for Android Add-ons.
Add extra features and styles to make Firefox for Android your own.
CloseReview for CookieKeeper by mooms
Rated 4 out of 5 stars
I've found a web extension replacement, that works as well, if not better:
Cookie AutoDelete
https://addons.mozilla.org/firefox/addon/cookie-autodelete/
To create your own collections, you must have a Mozilla Add-ons account.