diff --git a/dom/console/Console.cpp b/dom/console/Console.cpp
index ddec30d878c1..990c65faa48d 100644
--- a/dom/console/Console.cpp
+++ b/dom/console/Console.cpp
@@ -87,6 +87,10 @@ static bool ProcessArguments(JSContext* aCx, const Sequence<JS::Value>& aData,
                              Sequence<JS::Value>& aSequence,
                              Sequence<nsString>& aStyles);
 
+static JS::Value CreateCounterOrResetCounterValue(JSContext* aCx,
+                                                  const nsAString& aCountLabel,
+                                                  uint32_t aCountValue);
+
 /**
  * Console API in workers uses the Structured Clone Algorithm to move any value
  * from the worker thread to the main-thread. Some object cannot be moved and,
@@ -2296,8 +2300,16 @@ uint32_t Console::ResetCounter(JSContext* aCx,
   return MAX_PAGE_COUNTERS;
 }
 
-JS::Value Console::CreateCounterOrResetCounterValue(
-    JSContext* aCx, const nsAString& aCountLabel, uint32_t aCountValue) const {
+// This method generates a ConsoleCounter dictionary as JS::Value. If
+// aCountValue is == MAX_PAGE_COUNTERS it generates a ConsoleCounterError
+// instead. See IncreaseCounter.
+// * aCx - this is the context that will root the returned value.
+// * aCountLabel - this label must be what IncreaseCounter received as
+//                 aTimerLabel.
+// * aCountValue - the return value of IncreaseCounter.
+static JS::Value CreateCounterOrResetCounterValue(JSContext* aCx,
+                                                  const nsAString& aCountLabel,
+                                                  uint32_t aCountValue) {
   ConsoleCommon::ClearException ce(aCx);
 
   if (aCountValue == MAX_PAGE_COUNTERS) {
diff --git a/dom/console/Console.h b/dom/console/Console.h
index 659c96bfed08..6e195b45a903 100644
--- a/dom/console/Console.h
+++ b/dom/console/Console.h
@@ -346,17 +346,6 @@ class Console final : public nsIObserver, public nsSupportsWeakReference {
   uint32_t ResetCounter(JSContext* aCx, const Sequence<JS::Value>& aData,
                         nsAString& aCountLabel);
 
-  // This method generates a ConsoleCounter dictionary as JS::Value. If
-  // aCountValue is == MAX_PAGE_COUNTERS it generates a ConsoleCounterError
-  // instead. See IncreaseCounter.
-  // * aCx - this is the context that will root the returned value.
-  // * aCountLabel - this label must be what IncreaseCounter received as
-  //                 aTimerLabel.
-  // * aCountValue - the return value of IncreaseCounter.
-  JS::Value CreateCounterOrResetCounterValue(JSContext* aCx,
-                                             const nsAString& aCountLabel,
-                                             uint32_t aCountValue) const;
-
   static bool ShouldIncludeStackTrace(MethodName aMethodName);
 
   JSObject* GetOrCreateSandbox(JSContext* aCx, nsIPrincipal* aPrincipal);