diff --git a/src/ZenGlanceManager.mjs b/src/ZenGlanceManager.mjs
index 593faa7..0c43ae3 100644
--- a/src/ZenGlanceManager.mjs
+++ b/src/ZenGlanceManager.mjs
@@ -8,6 +8,8 @@
     #animating = false;
 
     init() {
+      document.documentElement.setAttribute("zen-glance-uuid", gZenUIManager.generateUuidv4());
+
       ChromeUtils.defineLazyGetter(
         this,
         'overlay',
@@ -42,14 +44,9 @@
 
       window.addEventListener("keydown", this.onKeyDown.bind(this));
 
-      Services.obs.addObserver(this, "zen-glance-open");
       this.initProgressListener();
     }
 
-    observe(subject, topic, data) {
-      this.openGlance(JSON.parse(data));
-    }
-
     initProgressListener() {
       this.progressListener = {
         QueryInterface: ChromeUtils.generateQI(['nsIWebProgressListener', 'nsISupportsWeakReference']),
@@ -243,7 +240,6 @@
 
   window.gZenGlanceManager = new ZenGlanceManager();
 
-
   function registerWindowActors() {
     if (Services.prefs.getBoolPref("zen.glance.enabled", true)) {
       gZenActorsManager.addJSWindowActor("ZenGlance", {
diff --git a/src/actors/ZenGlanceParent.sys.mjs b/src/actors/ZenGlanceParent.sys.mjs
index ee7043f..edbb157 100644
--- a/src/actors/ZenGlanceParent.sys.mjs
+++ b/src/actors/ZenGlanceParent.sys.mjs
@@ -12,13 +12,13 @@ export class ZenGlanceParent extends JSWindowActorParent {
         return Services.prefs.getIntPref('zen.glance.hold-duration', 500);
       }
       case 'ZenGlance:OpenGlance': {
-        this.openGlance(message.data);
+        this.openGlance(this.browsingContext.topChromeWindow, message.data);
         break;
       }
     }
   }
 
-  openGlance(data) {
-    Services.obs.notifyObservers(null, 'zen-glance-open', JSON.stringify(data));
+  openGlance(window, data) {
+    window.gZenGlanceManager.openGlance(data);
   }
 }