diff --git a/ext/fg/float.html b/ext/fg/float.html
index c8ea9b67..85c806fd 100644
--- a/ext/fg/float.html
+++ b/ext/fg/float.html
@@ -56,7 +56,8 @@
         <script src="/mixed/js/template-handler.js"></script>
 
         <script src="/fg/js/float.js"></script>
-
         <script src="/fg/js/popup-nested.js"></script>
+
+        <script src="/fg/js/float-main.js"></script>
     </body>
 </html>
diff --git a/ext/fg/js/float-main.js b/ext/fg/js/float-main.js
new file mode 100644
index 00000000..b752cdee
--- /dev/null
+++ b/ext/fg/js/float-main.js
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2020  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * DisplayFloat
+ */
+
+async function main() {
+    new DisplayFloat();
+}
+
+main();
diff --git a/ext/fg/js/float.js b/ext/fg/js/float.js
index 5c2c50c2..18d15a72 100644
--- a/ext/fg/js/float.js
+++ b/ext/fg/js/float.js
@@ -189,5 +189,3 @@ class DisplayFloat extends Display {
         }
     }
 }
-
-DisplayFloat.instance = new DisplayFloat();