1 files changed, 1 insertions, 2 deletions
diff --git a/dom/base/ChromeUtils.h b/dom/base/ChromeUtils.h
index 804fc44e4a..4c2d043ecb 100644
--- a/dom/base/ChromeUtils.h
+++ b/dom/base/ChromeUtils.h
@@ -129,8 +129,7 @@ class ChromeUtils {
   static bool IsOriginAttributesEqualIgnoringFPD(
       const dom::OriginAttributesDictionary& aA,
       const dom::OriginAttributesDictionary& aB) {
-    return aA.mInIsolatedMozBrowser == aB.mInIsolatedMozBrowser &&
-           aA.mUserContextId == aB.mUserContextId &&
+    return aA.mUserContextId == aB.mUserContextId &&
            aA.mPrivateBrowsingId == aB.mPrivateBrowsingId;
   }