diff --git a/src/ZenGlanceManager.mjs b/src/ZenGlanceManager.mjs
index 05b97ab..8f1c37e 100644
--- a/src/ZenGlanceManager.mjs
+++ b/src/ZenGlanceManager.mjs
@@ -40,6 +40,8 @@
 
       this.originalOverlayParent = this.overlay.parentNode;
 
+      window.addEventListener("keydown", this.onKeyDown.bind(this));
+
       Services.obs.addObserver(this, "zen-glance-open");
       this.initProgressListener();
     }
@@ -62,6 +64,12 @@
       };
     }
 
+    onKeyDown(event) {
+      if (event.key === "Escape") {
+        this.closeGlance();
+      }
+    }
+
     onOverlayClick(event) {
       if (event.target === this.overlay || event.target === this.contentWrapper) {
         this.closeGlance();