From 9550c68d7a2f369b0b8800359142abd620b4c74e Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Wed, 18 Mar 2020 21:15:10 +0100
Subject: [DOM] Make sure to exit fullscreen mode if popups are opened or
 focused.

---
 embedding/components/windowwatcher/nsWindowWatcher.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'embedding/components/windowwatcher/nsWindowWatcher.cpp')

diff --git a/embedding/components/windowwatcher/nsWindowWatcher.cpp b/embedding/components/windowwatcher/nsWindowWatcher.cpp
index 3732ea66d..fa23e285b 100644
--- a/embedding/components/windowwatcher/nsWindowWatcher.cpp
+++ b/embedding/components/windowwatcher/nsWindowWatcher.cpp
@@ -1297,6 +1297,12 @@ nsWindowWatcher::OpenWindowInternal(mozIDOMWindowProxy* aParent,
     }
   }
 
+  // If a website opens a popup exit DOM fullscreen
+  if (windowIsNew && aCalledFromJS && !hasChromeParent && !isCallerChrome &&
+      parentWindow) {
+    nsIDocument::AsyncExitFullscreen(parentWindow->GetDoc());
+  }
+			
   if (aForceNoOpener && windowIsNew) {
     NS_RELEASE(*aResult);
   }
-- 
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