diff --git a/src/content/index.js b/src/content/index.js
index dab2449..93d2171 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -9,6 +9,7 @@ const init = async () => {
   await initSettings();
   document.addEventListener("mouseup", handleMouseUp);
   document.addEventListener("keydown", handleKeyDown);
+  window.addEventListener("unload", onUnload, { once: true });
   browser.storage.onChanged.addListener(handleSettingsChange);
   browser.runtime.onMessage.addListener(handleMessage);
   overWriteLogLevel();
@@ -132,6 +133,10 @@ const handleKeyDown = e => {
   }
 };
 
+const onUnload = () => {
+  browser.storage.onChanged.removeListener(handleSettingsChange);
+};
+
 let isEnabled = true;
 const handleMessage = async request => {
   const empty = new Promise(resolve => {