1 files changed, 11 insertions, 0 deletions
diff --git a/layout/style/nsCSSRuleProcessor.cpp b/layout/style/nsCSSRuleProcessor.cpp
index f637a063a6..dc2157084b 100644
--- a/layout/style/nsCSSRuleProcessor.cpp
+++ b/layout/style/nsCSSRuleProcessor.cpp
@@ -1931,6 +1931,17 @@ static bool SelectorMatches(Element* aElement,
         }
         break;
 
+      case CSSPseudoClassType::mozAnyPrivate:
+        {
+          if (!SelectorListMatches(aElement,
+                                   pseudoClass,
+                                   aNodeMatchContext,
+                                   aTreeMatchContext)) {
+            return false;
+          }
+        }
+        break;
+
       case CSSPseudoClassType::host:
         {
           // In order to match :host, the element must be a shadow root host,