diff --git a/dom/security/ReferrerInfo.cpp b/dom/security/ReferrerInfo.cpp
index a79f1bc36d1e..050cb916f2e3 100644
--- a/dom/security/ReferrerInfo.cpp
+++ b/dom/security/ReferrerInfo.cpp
@@ -198,7 +198,13 @@ ReferrerPolicy ReferrerInfo::GetDefaultReferrerPolicy(nsIHttpChannel* aChannel,
     if (!cjs) {
       cjs = net::CookieJarSettings::Create();
     }
-    if (cjs->GetRejectThirdPartyContexts()) {
+
+    // We only check if the channel is isolated if it's in the parent process
+    // with the rejection of third party contexts is enabled. We don't need to
+    // check this in content processes since the tracking state of the channel
+    // is unknown here and the referrer policy would be updated when the channel
+    // starts connecting in the parent process.
+    if (XRE_IsParentProcess() && cjs->GetRejectThirdPartyContexts()) {
       uint32_t rejectedReason = 0;
       thirdPartyTrackerIsolated = !ContentBlocking::ShouldAllowAccessFor(
           aChannel, aURI, &rejectedReason);