diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 1dff6fb9..a31bdf79 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -56,6 +56,7 @@ class Frontend {
             window.addEventListener('mousedown', this.onMouseDown.bind(this));
             window.addEventListener('mousemove', this.onMouseMove.bind(this));
             window.addEventListener('mouseover', this.onMouseOver.bind(this));
+            window.addEventListener('mouseout', this.onMouseOut.bind(this));
             window.addEventListener('mouseup', this.onMouseUp.bind(this));
             window.addEventListener('resize', this.onResize.bind(this));
 
@@ -149,6 +150,10 @@ class Frontend {
         }
     }
 
+    onMouseOut(e) {
+        this.popupTimerClear();
+    }
+
     onFrameMessage(e) {
         const handlers = {
             popupClose: () => {