diff --git a/dom/base/ContentBlockingLog.h b/dom/base/ContentBlockingLog.h
index 7ec955964ed9..2843a988b2a0 100644
--- a/dom/base/ContentBlockingLog.h
+++ b/dom/base/ContentBlockingLog.h
@@ -30,7 +30,8 @@ class ContentBlockingLog final
   // Each element is a tuple of (type, blocked, repeatCount). The type values
   // come from the blocking types defined in nsIWebProgressListener.
   typedef nsTArray<LogEntry> OriginLog;
-  typedef nsClassHashtable<nsStringHashKey, OriginLog> OriginLogHashTable;
+  typedef Pair<bool, OriginLog> OriginData;
+  typedef nsClassHashtable<nsStringHashKey, OriginData> OriginDataHashTable;
 
   struct StringWriteFunc : public JSONWriteFunc
   {
@@ -56,9 +57,14 @@ public:
     }
     auto entry = mLog.LookupForAdd(aOrigin);
     if (entry) {
-      auto& log = entry.Data();
-      if (!log->IsEmpty()) {
-        auto& last = log->LastElement();
+      auto& data = entry.Data();
+      if (aType == nsIWebProgressListener::STATE_LOADED_TRACKING_CONTENT) {
+        data->first() = aBlocked;
+        return;
+      }
+      auto& log = data->second();
+      if (!log.IsEmpty()) {
+        auto& last = log.LastElement();
         if (last.mType == aType &&
             last.mBlocked == aBlocked) {
           ++last.mRepeatCount;
@@ -66,17 +72,21 @@ public:
           return;
         }
       }
-      if (log->Length() ==
+      if (log.Length() ==
             std::max(1u, StaticPrefs::browser_contentblocking_originlog_length())) {
         // Cap the size at the maximum length adjustable by the pref
-        log->RemoveElementAt(0);
+        log.RemoveElementAt(0);
       }
-      log->AppendElement(LogEntry{aType, 1u, aBlocked});
+      log.AppendElement(LogEntry{aType, 1u, aBlocked});
     } else {
       entry.OrInsert([=] {
-        auto log(MakeUnique<OriginLog>());
-        log->AppendElement(LogEntry{aType, 1u, aBlocked});
-        return log.release();
+        nsAutoPtr<OriginData> data(new OriginData(false, OriginLog()));
+        if (aType == nsIWebProgressListener::STATE_LOADED_TRACKING_CONTENT) {
+          data->first() = true;
+        } else {
+          data->second().AppendElement(LogEntry{aType, 1u, aBlocked});
+        }
+        return data.forget();
       });
     }
   }
@@ -96,7 +106,17 @@ public:
       }
 
       w.StartArrayProperty(NS_ConvertUTF16toUTF8(iter.Key()).get(), w.SingleLineStyle);
-      for (auto& item: *iter.UserData()) {
+      auto& data = *iter.UserData();
+      if (data.first()) {
+        w.StartArrayElement(w.SingleLineStyle);
+        {
+          w.IntElement(nsIWebProgressListener::STATE_LOADED_TRACKING_CONTENT);
+          w.BoolElement(true); // blocked
+          w.IntElement(1);     // repeat count
+        }
+        w.EndArray();
+      }
+      for (auto& item: data.second()) {
         w.StartArrayElement(w.SingleLineStyle);
         {
           w.IntElement(item.mType);
@@ -120,10 +140,16 @@ public:
         continue;
       }
 
-      for (auto& item: *iter.UserData()) {
-        if ((item.mType & aType) != 0) {
+      if (aType == nsIWebProgressListener::STATE_LOADED_TRACKING_CONTENT) {
+        if (iter.UserData()->first()) {
           return true;
         }
+      } else {
+        for (auto& item: iter.UserData()->second()) {
+          if ((item.mType & aType) != 0) {
+            return true;
+          }
+        }
       }
     }
     return false;
@@ -136,17 +162,17 @@ public:
     // Now add the sizes of each origin log queue.
     // The const_cast is needed because the nsTHashtable::Iterator interface is
     // not const-safe.  :-(
-    for (auto iter = const_cast<OriginLogHashTable&>(mLog).Iter();
+    for (auto iter = const_cast<OriginDataHashTable&>(mLog).Iter();
          !iter.Done(); iter.Next()) {
       if (iter.UserData()) {
         aSizes.mDOMOtherSize +=
-          iter.UserData()->ShallowSizeOfIncludingThis(aSizes.mState.mMallocSizeOf);
+          iter.UserData()->second().ShallowSizeOfIncludingThis(aSizes.mState.mMallocSizeOf);
       }
     }
   }
 
 private:
-  OriginLogHashTable mLog;
+  OriginDataHashTable mLog;
 };
 
 } // namespace dom
diff --git a/toolkit/components/antitracking/test/browser/browser_subResources.js b/toolkit/components/antitracking/test/browser/browser_subResources.js
index ae52c2143713..21285963b255 100644
--- a/toolkit/components/antitracking/test/browser/browser_subResources.js
+++ b/toolkit/components/antitracking/test/browser/browser_subResources.js
@@ -156,55 +156,29 @@ add_task(async function() {
       is(text, 1, "One cookie received received for scripts.");
     });
 
-  let expectTrackerFound = item => {
-    is(item[0], Ci.nsIWebProgressListener.STATE_LOADED_TRACKING_CONTENT,
-       "Correct blocking type reported");
-    is(item[1], true,
-       "Correct blocking status reported");
-    ok(item[2] >= 1,
-       "Correct repeat count reported");
-  };
-
   let log = JSON.parse(await browser.getContentBlockingLog());
   for (let trackerOrigin in log) {
     is(trackerOrigin, TEST_3RD_PARTY_DOMAIN, "Correct tracker origin must be reported");
     let originLog = log[trackerOrigin];
-    is(originLog.length, 10, "We should have 10 entries in the compressed log");
-    expectTrackerFound(originLog[0]);
+    is(originLog.length, 3, "We should have 3 entries in the compressed log");
+    is(originLog[0][0], Ci.nsIWebProgressListener.STATE_LOADED_TRACKING_CONTENT,
+       "Correct blocking type reported");
+    is(originLog[0][1], true,
+       "Correct blocking status reported");
+    ok(originLog[0][2] >= 1,
+       "Correct repeat count reported");
     is(originLog[1][0], Ci.nsIWebProgressListener.STATE_COOKIES_BLOCKED_TRACKER,
        "Correct blocking type reported");
     is(originLog[1][1], true,
        "Correct blocking status reported");
-    is(originLog[1][2], 1,
+    is(originLog[1][2], 6,
        "Correct repeat count reported");
-    expectTrackerFound(originLog[2]);
-    is(originLog[3][0], Ci.nsIWebProgressListener.STATE_COOKIES_BLOCKED_TRACKER,
+    is(originLog[2][0], Ci.nsIWebProgressListener.STATE_COOKIES_BLOCKED_TRACKER,
        "Correct blocking type reported");
-    is(originLog[3][1], true,
+    is(originLog[2][1], false,
        "Correct blocking status reported");
-    is(originLog[3][2], 1,
+    ok(originLog[2][2] >= 1,
        "Correct repeat count reported");
-    expectTrackerFound(originLog[4]);
-    is(originLog[5][0], Ci.nsIWebProgressListener.STATE_COOKIES_BLOCKED_TRACKER,
-       "Correct blocking type reported");
-    is(originLog[5][1], true,
-       "Correct blocking status reported");
-    is(originLog[5][2], 1,
-       "Correct repeat count reported");
-    expectTrackerFound(originLog[6]);
-    is(originLog[7][0], Ci.nsIWebProgressListener.STATE_COOKIES_BLOCKED_TRACKER,
-       "Correct blocking type reported");
-    is(originLog[7][1], true,
-       "Correct blocking status reported");
-    is(originLog[7][2], 3,
-       "Correct repeat count reported");
-    is(originLog[8][0], Ci.nsIWebProgressListener.STATE_COOKIES_BLOCKED_TRACKER,
-       "Correct blocking type reported");
-    is(originLog[8][1], false,
-       "Correct blocking status reported");
-    is(originLog[8][2], 1,
-       "Correct repeat count reported");
-    expectTrackerFound(originLog[9]);
   }
 
   info("Removing the tab");