diff --git a/netwerk/cookie/CookieJarSettings.cpp b/netwerk/cookie/CookieJarSettings.cpp
index ae078873af1f..b9d6e3c5a216 100644
--- a/netwerk/cookie/CookieJarSettings.cpp
+++ b/netwerk/cookie/CookieJarSettings.cpp
@@ -137,9 +137,7 @@ NS_IMETHODIMP
 CookieJarSettings::GetRejectThirdPartyTrackers(
     bool* aRejectThirdPartyTrackers) {
   *aRejectThirdPartyTrackers =
-      mCookieBehavior == nsICookieService::BEHAVIOR_REJECT_TRACKER ||
-      mCookieBehavior ==
-          nsICookieService::BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN;
+      CookieJarSettings::IsRejectThirdPartyTrackers(mCookieBehavior);
   return NS_OK;
 }
 
@@ -407,6 +405,13 @@ void CookieJarSettings::UpdateIsOnContentBlockingAllowList(
                                             mIsOnContentBlockingAllowList);
 }
 
+// static
+bool CookieJarSettings::IsRejectThirdPartyTrackers(uint32_t aCookieBehavior) {
+  return aCookieBehavior == nsICookieService::BEHAVIOR_REJECT_TRACKER ||
+         aCookieBehavior ==
+             nsICookieService::BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN;
+}
+
 NS_IMPL_ISUPPORTS(CookieJarSettings, nsICookieJarSettings)
 
 }  // namespace net
diff --git a/netwerk/cookie/CookieJarSettings.h b/netwerk/cookie/CookieJarSettings.h
index e16d8af34163..d7cedbaf162d 100644
--- a/netwerk/cookie/CookieJarSettings.h
+++ b/netwerk/cookie/CookieJarSettings.h
@@ -137,6 +137,10 @@ class CookieJarSettings final : public nsICookieJarSettings {
 
   void UpdateIsOnContentBlockingAllowList(nsIChannel* aChannel);
 
+  // Utility function to test if the passed cookiebahvior is
+  // BEHAVIOR_REJECT_TRACKER or BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN;
+  static bool IsRejectThirdPartyTrackers(uint32_t aCookieBehavior);
+
  private:
   enum State {
     // No cookie permissions are allowed to be stored in this object.
diff --git a/toolkit/components/antitracking/ContentBlocking.cpp b/toolkit/components/antitracking/ContentBlocking.cpp
index 3f591360c49c..5f16b6af0643 100644
--- a/toolkit/components/antitracking/ContentBlocking.cpp
+++ b/toolkit/components/antitracking/ContentBlocking.cpp
@@ -13,6 +13,8 @@
 #include "mozilla/ContentBlockingUserInteraction.h"
 #include "mozilla/dom/BrowsingContext.h"
 #include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/WindowContext.h"
+#include "mozilla/net/CookieJarSettings.h"
 #include "mozilla/StaticPrefs_privacy.h"
 #include "mozIThirdPartyUtil.h"
 #include "nsContentUtils.h"
@@ -287,10 +289,40 @@ ContentBlocking::AllowAccessFor(
          PromiseFlatCString(origin).get()));
   }
 
+  RefPtr<dom::WindowContext> parentWindowContext =
+      aParentContext->GetCurrentWindowContext();
+  if (!parentWindowContext) {
+    LOG(
+        ("No window context found for our parent browsing context, bailing out "
+         "early"));
+    return StorageAccessGrantPromise::CreateAndReject(false, __func__);
+  }
+
+  Maybe<net::CookieJarSettingsArgs> cookieJarSetting =
+      parentWindowContext->GetCookieJarSettings();
+  if (cookieJarSetting.isNothing()) {
+    LOG(
+        ("No cookiejar setting found for our parent window context, bailing "
+         "out early"));
+    return StorageAccessGrantPromise::CreateAndReject(false, __func__);
+  }
+
+  uint32_t behavior = cookieJarSetting->cookieBehavior();
+  if (!net::CookieJarSettings::IsRejectThirdPartyTrackers(behavior)) {
+    LOG(
+        ("Disabled by network.cookie.cookieBehavior pref (%d), bailing out "
+         "early",
+         behavior));
+    return StorageAccessGrantPromise::CreateAndResolve(true, __func__);
+  }
+
+  MOZ_ASSERT(
+      behavior == nsICookieService::BEHAVIOR_REJECT_TRACKER ||
+      behavior ==
+          nsICookieService::BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN);
+
   nsCOMPtr<nsPIDOMWindowOuter> parentOuter = aParentContext->GetDOMWindow();
   if (!parentOuter) {
-    // TODO: Bug 1616775 should implement the parent version of AllowAccessFor
-    // here when parent window is NOT in-process.
     LOG(
         ("No outer window found for our parent window context, bailing out "
          "early"));
@@ -306,26 +338,6 @@ ContentBlocking::AllowAccessFor(
     return StorageAccessGrantPromise::CreateAndReject(false, __func__);
   }
 
-  Document* parentDoc = parentInner->GetExtantDoc();
-  if (!parentDoc) {
-    LOG(("No document found for our parent inner window, bailing out early"));
-    return StorageAccessGrantPromise::CreateAndReject(false, __func__);
-  }
-  int32_t behavior = parentDoc->CookieJarSettings()->GetCookieBehavior();
-
-  if (!parentDoc->CookieJarSettings()->GetRejectThirdPartyTrackers()) {
-    LOG(
-        ("Disabled by network.cookie.cookieBehavior pref (%d), bailing out "
-         "early",
-         behavior));
-    return StorageAccessGrantPromise::CreateAndResolve(true, __func__);
-  }
-
-  MOZ_ASSERT(
-      behavior == nsICookieService::BEHAVIOR_REJECT_TRACKER ||
-      behavior ==
-          nsICookieService::BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN);
-
   if (ContentBlockingAllowList::Check(parentInner)) {
     return StorageAccessGrantPromise::CreateAndResolve(true, __func__);
   }