Which version of firebase is best?

Several people have worked on our ionic angular app over the last 12 months (often in isolation), and as a result there are three different firebase plugins used. I’m assuming we don’t need all three, so which ones can be discarded - which is considered the best one - if any?

Screenshot 2020-06-01 at 12.15.19

I only use this. It is also the best maintained.

I’ll check it out, thanks.