3 files changed, 6 insertions, 6 deletions
diff --git a/ext/fg/js/float.js b/ext/fg/js/float.js
index 7cc9c367..aef0367e 100644
--- a/ext/fg/js/float.js
+++ b/ext/fg/js/float.js
@@ -51,8 +51,8 @@ class DisplayFloat extends Display {
             ['setContentScale', ({scale}) => this.setContentScale(scale)]
         ]);
 
-        yomichan.on('orphaned', () => this.onOrphaned());
-        window.addEventListener('message', (e) => this.onMessage(e), false);
+        yomichan.on('orphaned', this.onOrphaned.bind(this));
+        window.addEventListener('message', this.onMessage.bind(this), false);
     }
 
     async prepare(options, popupInfo, url, childrenSupported, scale, uniqueId) {
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 71ca7c9e..929ab56a 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -64,9 +64,9 @@ class Frontend extends TextScanner {
                 window.visualViewport.addEventListener('resize', this.onVisualViewportResize.bind(this));
             }
 
-            yomichan.on('orphaned', () => this.onOrphaned());
-            yomichan.on('optionsUpdated', () => this.updateOptions());
-            yomichan.on('zoomChanged', (e) => this.onZoomChanged(e));
+            yomichan.on('orphaned', this.onOrphaned.bind(this));
+            yomichan.on('optionsUpdated', this.updateOptions.bind(this));
+            yomichan.on('zoomChanged', this.onZoomChanged.bind(this));
             chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
 
             this._updateContentScale();
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index 4927f4bd..bc40a8c4 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -260,7 +260,7 @@ class Popup {
             'mozfullscreenchange',
             'webkitfullscreenchange'
         ];
-        const onFullscreenChanged = () => this._onFullscreenChanged();
+        const onFullscreenChanged = this._onFullscreenChanged.bind(this);
         for (const eventName of fullscreenEvents) {
             this._fullscreenEventListeners.addEventListener(document, eventName, onFullscreenChanged, false);
         }