const editor = grapesjs.init({
	container: '#gjs',
  height: '100%',
  fromElement: true,
  storageManager: false,
  assetManager: {
    embedAsBase64: 0, // Disable base64 encoding 
  },
  plugins: ['grapesjs-firebase-storage'],
  pluginsOpts: {
    'grapesjs-firebase-storage': {
      firebaseConfig: {
        // ...
      }
    }
  }
});

<link href="https://unpkg.com/grapesjs/dist/css/grapes.min.css" rel="stylesheet">
<script src="https://unpkg.com/grapesjs"></script>
<script src="https://unpkg.com/grapesjs-firebase-storage"></script>
<link href="https://unpkg.com/grapesjs-template-manager/dist/grapesjs-template-manager.min.css" rel="stylesheet">
<script src="https://unpkg.com/grapesjs-template-manager"></script>
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/8.6.2/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.2/firebase-storage.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.2/firebase-firestore.js"></script>

window.editor = grapesjs.init({
  height: '100%',
  container: '#gjs',
  showOffsets: true,
  fromElement: true,
  noticeOnUnload: false,
  storageManager: false,
  assetManager: {
    embedAsBase64: 0,
  },
  storageManager:  {
    type: 'firestore'
  },
  plugins: ['grapesjs-firebase-storage', 'grapesjs-template-manager'],
  pluginsOpts: {
    'grapesjs-firebase-storage': {
      firebaseConfig: {
        apiKey: "FIREBASE_API_KEY",
        authDomain: "PROJECT_ID.firebaseapp.com",
        projectId: "PROJECT_ID",
        databaseURL: "https://PROJECT_ID.firebaseio.com",
        storageBucket: "PROJECT_ID.appspot.com",
        messagingSenderId: "SENDER_ID",
        appId: "APP_ID",
        measurementId: "MEASUREMENT_ID"
      }
    }
  }
});

// Optional: Add template manager buttons
const pn = editor.Panels;
const panelOpts = pn.addPanel({
  id: 'options'
});
panelOpts.get('buttons').add([{
  attributes: {
    title: 'Open Templates'
  },
  className: 'fa fa-file-o',
  command: 'open-templates',//Open modal 
  id: 'open-templates'
}, {
  attributes: {
    title: 'Save As Template'
  },
  className: 'fa fa-archive',
  command: 'save-as-template',//Save page as template
  id: 'save-as-template'
}, {
  attributes: {
    title: 'Delete Template'
  },
  className: 'fa fa-trash-o',
  command: 'delete-template',//Delete open page or template
  id: 'delete-templates'
}, {
  attributes: {
    title: 'Take Screenshot'
  },
  className: 'fa fa-camera',
  command: 'take-screenshot',//Take an image of the canvas
  id: 'take-screenshot'
}]);

import grapesjs from 'grapesjs';
import plugin from 'grapesjs-firebase-storage';
import 'grapesjs/dist/css/grapes.min.css';

const editor = grapesjs.init({
  container : '#gjs',
  // ...
  plugins: [plugin],
  pluginsOpts: {
    [plugin]: { /* options */ }
  }
  // or
  plugins: [
    editor => plugin(editor, { /* options */ }),
  ],
});