CDN settings for Firebase

_config.yml

@@ -919,6 +919,10 @@ vendors:
   gitalk_js:
   gitalk_css:
 
+  # Firebase
+  firebase_app:
+  firebase_firestore:
+
   # Algolia Search
   algolia_search:
   instant_search:

_vendors.yml

@@ -102,6 +102,14 @@ gitalk_css:
   name: gitalk
   version: 1.6.2
   file: dist/gitalk.css
+firebase_app:
+  name: firebase
+  version: 7.17.2
+  file: firebase-app.js
+firebase_firestore:
+  name: firebase
+  version: 7.17.2
+  file: firebase-firestore.js
 algolia_search:
   name: algoliasearch
   version: 4.3.1

layout/_third-party/statistics/firestore.njk

@@ -1,6 +1,6 @@
 {%- if theme.firestore.enable %}
-  <script src="//cdn.jsdelivr.net/npm/firebase@7/firebase-app.js"></script>
+  <script src="{{ theme.vendors.firebase_app }}"></script>
-  <script src="//cdn.jsdelivr.net/npm/firebase@7/firebase-firestore.js"></script>
+  <script src="{{ theme.vendors.firebase_firestore }}"></script>
   <script>
     firebase.initializeApp({
       apiKey   : '{{ theme.firestore.apiKey }}',