Overview
I have been developing a Firebase-linked annotations plugin for Mirador 3.
Previously, only Google account login functionality was provided, but I have now added email-based login functionality.
Feature Introduction
Below is the screen after pressing the login button.

With email-based login, new account creation is possible.

After login, user information is now displayed.

Clicking the icon displays a logout button.

Summary
I hope this serves as a helpful reference for creating and sharing annotations using IIIF.