Using Checkmarks under Android

https://blog.mozilla.org/addons/2020/09/29/expanded-extension-support-in-firefox-for-android-nightly/

Add-on collections can also be used to install add-ons on Android Firefox Nightly (and Fennec F-Droid) that have not yet been explicitly released by Mozilla as add-ons for Android.

Is there any experience with this in particular?
Thanks