diff --git a/browser_patches/webkit/BUILD_NUMBER b/browser_patches/webkit/BUILD_NUMBER
index 289f3b1d67..71163ebc2a 100644
--- a/browser_patches/webkit/BUILD_NUMBER
+++ b/browser_patches/webkit/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1380
-Changed: yurys@chromium.org Fri Nov  6 01:49:33 GMTST 2020
+1381
+Changed: einbinder@chromium.org Fri 06 Nov 2020 10:35:03 AM PST
diff --git a/browser_patches/webkit/patches/bootstrap.diff b/browser_patches/webkit/patches/bootstrap.diff
index 6133bcfbfc..6d1f0e5a4d 100644
--- a/browser_patches/webkit/patches/bootstrap.diff
+++ b/browser_patches/webkit/patches/bootstrap.diff
@@ -7650,23 +7650,6 @@ index e40a6e172bfd2b75076fd4053da643ebab9eb81f..2516655bbc9e5bc863537a554c5faac0
  
 -#endif // ENABLE(TOUCH_EVENTS)
 +#endif // ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
-diff --git a/Source/WebKit/Shared/mac/AuxiliaryProcessMac.mm b/Source/WebKit/Shared/mac/AuxiliaryProcessMac.mm
-index 22c0b189aafc69405083c36004b4d4de4f3bbfd1..1d883c903018a2bb33db8f1458adda8b04a089bc 100644
---- a/Source/WebKit/Shared/mac/AuxiliaryProcessMac.mm
-+++ b/Source/WebKit/Shared/mac/AuxiliaryProcessMac.mm
-@@ -63,7 +63,11 @@
- #endif
- 
- #if PLATFORM(MAC)
--#define USE_CACHE_COMPILED_SANDBOX 1
-+// Playwright begin
-+// Disable compiled sandbox since it doesn't work on BigSUr.
-+// #define USE_CACHE_COMPILED_SANDBOX 1
-+#define USE_CACHE_COMPILED_SANDBOX 0
-+// Playwright end
- #else
- #define USE_CACHE_COMPILED_SANDBOX 0
- #endif
 diff --git a/Source/WebKit/Shared/win/WebEventFactory.cpp b/Source/WebKit/Shared/win/WebEventFactory.cpp
 index 88d53d236cd6d62735f03678a04ca9c198dddacb..b8f8efc57ab00dc5725660c5a8ad56a3e6384de5 100644
 --- a/Source/WebKit/Shared/win/WebEventFactory.cpp
@@ -16559,6 +16542,38 @@ index dfa57c655ada7cf97189b757c59aa901950aa9e8..56832e0190d11e0894a4c537b3ff3806
  }
  
  void WebProcess::initializeConnection(IPC::Connection* connection)
+diff --git a/Source/WebKit/WebProcess/com.apple.WebProcess.sb.in b/Source/WebKit/WebProcess/com.apple.WebProcess.sb.in
+index 3c3fbaab081e5775e9c6e40e571e56521c8de843..25ca899fc5fb6be42aceec515fcabbec7753a586 100644
+--- a/Source/WebKit/WebProcess/com.apple.WebProcess.sb.in
++++ b/Source/WebKit/WebProcess/com.apple.WebProcess.sb.in
+@@ -1218,14 +1218,19 @@
+ #include <WebKitAdditions/WebContentSandboxAdditionsMac.sb>
+ #endif
+ 
+-(when (defined? 'mach-bootstrap)
+-    (allow mach-bootstrap
+-        (apply-message-filter
+-            (allow xpc-message-send (with telemetry))
+-            (allow xpc-message-send (with telemetry) (message-number 206))
+-        )
+-    )
+-)
++;;; Playwright: This requires an entitlement
++;;; that only exists in builds signed by Apple.
++;;; It looks like we can disable it for now
++;;; without side effects
++;;;
++;;; (when (defined? 'mach-bootstrap)
++;;;     (allow mach-bootstrap
++;;;         (apply-message-filter
++;;;             (allow xpc-message-send (with telemetry))
++;;;             (allow xpc-message-send (with telemetry) (message-number 206))
++;;;         )
++;;;     )
++;;; )
+ 
+ (when (defined? 'mach-kernel-endpoint)
+     (allow mach-kernel-endpoint
 diff --git a/Source/WebKit/WebProcess/win/WebProcessMainWin.cpp b/Source/WebKit/WebProcess/win/WebProcessMainWin.cpp
 index 89bc159df35910abe133c68d71057cdfe1995cbb..aba8e9110a3ec4c59e9888b148e1e908d477cbe4 100644
 --- a/Source/WebKit/WebProcess/win/WebProcessMainWin.cpp