diff --git a/ext/bg/js/settings/popup-preview-frame.js b/ext/bg/js/settings/popup-preview-frame.js
index cabadced..53077a83 100644
--- a/ext/bg/js/settings/popup-preview-frame.js
+++ b/ext/bg/js/settings/popup-preview-frame.js
@@ -47,14 +47,15 @@ class SettingsPopupPreview {
         window.apiOptionsGet = (...args) => this.apiOptionsGet(...args);
 
         // Overwrite frontend
-        this.frontend = Frontend.create();
+        const popup = PopupProxyHost.instance.createPopup(null, 0);
+        popup.setChildrenSupported(false);
+
+        this.frontend = new Frontend(popup);
 
         this.frontend.setEnabled = function () {};
         this.frontend.searchClear = function () {};
 
-        this.frontend.popup.setChildrenSupported(false);
-
-        await this.frontend.isPrepared();
+        await this.frontend.prepare();
 
         // Overwrite popup
         Popup.injectOuterStylesheet = (...args) => this.popupInjectOuterStylesheet(...args);
diff --git a/ext/fg/js/frontend-initialize.js b/ext/fg/js/frontend-initialize.js
index 8ffdf528..4fef3a2e 100644
--- a/ext/fg/js/frontend-initialize.js
+++ b/ext/fg/js/frontend-initialize.js
@@ -17,4 +17,13 @@
  */
 
 
-Frontend.create();
+async function main() {
+    const data = window.frontendInitializationData || {};
+    const {id, depth=0, parentFrameId, ignoreNodes, url, proxy=false} = data;
+
+    const popup = proxy ? new PopupProxy(depth + 1, id, parentFrameId, url) : PopupProxyHost.instance.createPopup(null, depth);
+    const frontend = new Frontend(popup, ignoreNodes);
+    await frontend.prepare();
+}
+
+main();
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 6b41138f..6239a057 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -34,23 +34,10 @@ class Frontend extends TextScanner {
             url: popup.url
         };
 
-        this.isPreparedPromiseResolve = null;
-        this.isPreparedPromise = new Promise((resolve) => { this.isPreparedPromiseResolve = resolve; });
-
         this._orphaned = true;
         this._lastShowPromise = Promise.resolve();
     }
 
-    static create() {
-        const data = window.frontendInitializationData || {};
-        const {id, depth=0, parentFrameId, ignoreNodes, url, proxy=false} = data;
-
-        const popup = proxy ? new PopupProxy(depth + 1, id, parentFrameId, url) : PopupProxyHost.instance.createPopup(null, depth);
-        const frontend = new Frontend(popup, ignoreNodes);
-        frontend.prepare();
-        return frontend;
-    }
-
     async prepare() {
         try {
             await this.updateOptions();
@@ -58,16 +45,11 @@ class Frontend extends TextScanner {
             yomichan.on('orphaned', () => this.onOrphaned());
             yomichan.on('optionsUpdate', () => this.updateOptions());
             chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
-            this.isPreparedPromiseResolve();
         } catch (e) {
             this.onError(e);
         }
     }
 
-    isPrepared() {
-        return this.isPreparedPromise;
-    }
-
     async onResize() {
         const textSource = this.textSourceCurrent;
         if (textSource !== null && await this.popup.isVisible()) {