diff --git a/toolkit/components/antitracking/ContentBlocking.cpp b/toolkit/components/antitracking/ContentBlocking.cpp
index f5d024f7c6be..224a0a0c7217 100644
--- a/toolkit/components/antitracking/ContentBlocking.cpp
+++ b/toolkit/components/antitracking/ContentBlocking.cpp
@@ -322,6 +322,10 @@ ContentBlocking::AllowAccessFor(
       bool isThirdParty;
       nsCOMPtr<nsIPrincipal> principal =
           AntiTrackingUtils::GetPrincipal(aParentContext);
+      if (!principal) {
+        LOG(("Can't get the principal from the browsing context"));
+        return StorageAccessGrantPromise::CreateAndReject(false, __func__);
+      }
       Unused << trackingPrincipal->IsThirdPartyPrincipal(principal,
                                                          &isThirdParty);
       runInSameProcess = !isThirdParty;