diff --git a/ext/fg/float.html b/ext/fg/float.html
index 85c806fd..07c3c9e6 100644
--- a/ext/fg/float.html
+++ b/ext/fg/float.html
@@ -56,7 +56,6 @@
         <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>
diff --git a/ext/fg/js/float-main.js b/ext/fg/js/float-main.js
index b752cdee..072c86e0 100644
--- a/ext/fg/js/float-main.js
+++ b/ext/fg/js/float-main.js
@@ -17,8 +17,56 @@
 
 /* global
  * DisplayFloat
+ * apiOptionsGet
  */
 
+function injectPopupNested() {
+    const scriptSrcs = [
+        '/mixed/js/text-scanner.js',
+        '/fg/js/frontend-api-sender.js',
+        '/fg/js/popup.js',
+        '/fg/js/popup-proxy.js',
+        '/fg/js/frontend.js',
+        '/fg/js/content-script-main.js'
+    ];
+    for (const src of scriptSrcs) {
+        const script = document.createElement('script');
+        script.async = false;
+        script.src = src;
+        document.body.appendChild(script);
+    }
+}
+
+async function popupNestedInitialize(id, depth, parentFrameId, url) {
+    let optionsApplied = false;
+
+    const applyOptions = async () => {
+        const optionsContext = {depth, url};
+        const options = await apiOptionsGet(optionsContext);
+        const popupNestingMaxDepth = options.scanning.popupNestingMaxDepth;
+
+        const maxPopupDepthExceeded = !(
+            typeof popupNestingMaxDepth === 'number' &&
+            typeof depth === 'number' &&
+            depth < popupNestingMaxDepth
+        );
+        if (maxPopupDepthExceeded || optionsApplied) {
+            return;
+        }
+
+        optionsApplied = true;
+
+        window.frontendInitializationData = {id, depth, parentFrameId, url, proxy: true};
+        injectPopupNested();
+
+        yomichan.off('optionsUpdated', applyOptions);
+    };
+
+    yomichan.on('optionsUpdated', applyOptions);
+
+    await applyOptions();
+}
+
 async function main() {
     new DisplayFloat();
 }
diff --git a/ext/fg/js/popup-nested.js b/ext/fg/js/popup-nested.js
deleted file mode 100644
index 27482931..00000000
--- a/ext/fg/js/popup-nested.js
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Copyright (C) 2019-2020  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
- * apiOptionsGet
- */
-
-function injectPopupNested() {
-    const scriptSrcs = [
-        '/mixed/js/text-scanner.js',
-        '/fg/js/frontend-api-sender.js',
-        '/fg/js/popup.js',
-        '/fg/js/popup-proxy.js',
-        '/fg/js/frontend.js',
-        '/fg/js/content-script-main.js'
-    ];
-    for (const src of scriptSrcs) {
-        const script = document.createElement('script');
-        script.async = false;
-        script.src = src;
-        document.body.appendChild(script);
-    }
-}
-
-async function popupNestedInitialize(id, depth, parentFrameId, url) {
-    let optionsApplied = false;
-
-    const applyOptions = async () => {
-        const optionsContext = {depth, url};
-        const options = await apiOptionsGet(optionsContext);
-        const popupNestingMaxDepth = options.scanning.popupNestingMaxDepth;
-
-        const maxPopupDepthExceeded = !(
-            typeof popupNestingMaxDepth === 'number' &&
-            typeof depth === 'number' &&
-            depth < popupNestingMaxDepth
-        );
-        if (maxPopupDepthExceeded || optionsApplied) {
-            return;
-        }
-
-        optionsApplied = true;
-
-        window.frontendInitializationData = {id, depth, parentFrameId, url, proxy: true};
-        injectPopupNested();
-
-        yomichan.off('optionsUpdated', applyOptions);
-    };
-
-    yomichan.on('optionsUpdated', applyOptions);
-
-    await applyOptions();
-}