diff --git a/app/scripts/lib/notification-manager.js b/app/scripts/lib/notification-manager.js
index 218dd290e..e3516f5d8 100644
--- a/app/scripts/lib/notification-manager.js
+++ b/app/scripts/lib/notification-manager.js
@@ -54,6 +54,11 @@ class NotificationManager {
         left,
         top,
       })
+
+      // Firefox currently ignores left/top for create, but it works for update
+      if (popupWindow.left !== left) {
+        await this.platform.updateWindowPosition(popupWindow.id, left, top)
+      }
       this._popupId = popupWindow.id
     }
   }
diff --git a/app/scripts/platforms/extension.js b/app/scripts/platforms/extension.js
index 831b158c9..87bbb93ce 100644
--- a/app/scripts/platforms/extension.js
+++ b/app/scripts/platforms/extension.js
@@ -60,6 +60,18 @@ class ExtensionPlatform {
     })
   }
 
+  updateWindowPosition (windowId, left, top) {
+    return new Promise((resolve, reject) => {
+      extension.windows.update(windowId, { left, top }, () => {
+        const error = checkForError()
+        if (error) {
+          return reject(error)
+        }
+        return resolve()
+      })
+    })
+  }
+
   getLastFocusedWindow () {
     return new Promise((resolve, reject) => {
       extension.windows.getLastFocused((windowObject) => {