diff --git a/browser_patches/webkit/BUILD_NUMBER b/browser_patches/webkit/BUILD_NUMBER
index 5fb867eb46..c209762984 100644
--- a/browser_patches/webkit/BUILD_NUMBER
+++ b/browser_patches/webkit/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1456
-Changed: pavel.feldman@gmail.com Tue Mar 30 23:50:14 PDT 2021
+1457
+Changed: pavel.feldman@gmail.com Wed Mar 31 00:10:46 PDT 2021
diff --git a/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m b/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m
index 28e8b29ad8..4846caf4c1 100644
--- a/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m
+++ b/browser_patches/webkit/embedder/Playwright/mac/BrowserWindowController.m
@@ -440,8 +440,6 @@ static BOOL areEssentiallyEqual(double a, double b)
 
 - (void)windowWillClose:(NSNotification *)notification
 {
-    [_webView removeObserver:self forKeyPath:@"title"];
-    [_webView removeObserver:self forKeyPath:@"URL"];
     [_webView removeFromSuperview];
     _textFinder.hideInterfaceCallback = nil;
     [self release];