To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Provider for CalDAV & CardDAV by Bushrider
Rated 5 out of 5 stars
Very good extension but not compatible with version 102, update please.
Edit: I send 5€ to motivate john, if someone else wants to participate ...
To create your own collections, you must have a Mozilla Add-ons account.