1 files changed, 4 insertions, 8 deletions
diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
index 776044d72c..3493cd8374 100644
--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -4306,7 +4306,6 @@ MultiprocessBlockPolicy() {
 
   if (addonsCanDisable && disabledByAddons) {
     gMultiprocessBlockPolicy = kE10sDisabledForAddons;
-    return gMultiprocessBlockPolicy;
   }
 
 #if defined(XP_WIN)
@@ -4340,16 +4339,13 @@ MultiprocessBlockPolicy() {
 
   if (disabledForA11y) {
     gMultiprocessBlockPolicy = kE10sDisabledForAccessibility;
-    return gMultiprocessBlockPolicy;
   }
 #endif
+  
+  // We do not support E10S, block by policy.
+  gMultiprocessBlockPolicy = kE10sForceDisabled;
 
-  /*
-   * None of the blocking policies matched, so e10s is allowed to run.
-   * Cache the information and return 0, indicating success.
-   */
-  gMultiprocessBlockPolicy = 0;
-  return 0;
+  return gMultiprocessBlockPolicy;
 }
 
 bool