--- a/dom/console/Console.cpp
+++ b/dom/console/Console.cpp
@@ -297,18 +297,17 @@ private:
     MOZ_ASSERT(mStatus != eInUse);
   }
 };
 
 // This base class must be extended for Worker and for Worklet.
 class ConsoleRunnable : public StructuredCloneHolderBase
 {
 public:
-  virtual
-  ~ConsoleRunnable()
+  ~ConsoleRunnable() override
   {
     // Clear the StructuredCloneHolderBase class.
     Clear();
   }
 
 protected:
   JSObject*
   CustomReadHandler(JSContext* aCx,
@@ -541,18 +540,17 @@ protected:
     : Runnable("dom::console::ConsoleWorkletRunnable")
     , mConsole(aConsole)
     , mWorkletThread(WorkletThread::Get())
   {
     WorkletThread::AssertIsOnWorkletThread();
     MOZ_ASSERT(mWorkletThread);
   }
 
-  virtual
-  ~ConsoleWorkletRunnable() = default;
+  ~ConsoleWorkletRunnable() override = default;
 
   NS_IMETHOD
   Run() override
   {
     // This runnable is dispatched to main-thread first, then it goes back to
     // worklet thread.
     if (NS_IsMainThread()) {
       RunOnMainThread();
@@ -618,22 +616,22 @@ private:
     WorkletThread::AssertIsOnWorkletThread();
     MOZ_ASSERT(aCallData);
     aCallData->AssertIsOnOwningThread();
 
     // Marking this CallData as in use.
     mCallData->mStatus = ConsoleCallData::eInUse;
   }
 
-  ~ConsoleCallDataWorkletRunnable()
+  ~ConsoleCallDataWorkletRunnable() override
   {
     MOZ_ASSERT(!mCallData);
   }
 
-  virtual void
+  void
   RunOnMainThread() override
   {
     AutoSafeJSContext cx;
 
     JSObject* sandbox =
       mConsole->GetOrCreateSandbox(cx,
                                    mWorkletThread->GetWorkletLoadInfo().Principal());
     JS::Rooted<JSObject*> global(cx, sandbox);
@@ -667,18 +665,17 @@ class ConsoleWorkerRunnable : public Wor
                             , public ConsoleRunnable
 {
 public:
   explicit ConsoleWorkerRunnable(Console* aConsole)
     : WorkerProxyToMainThreadRunnable(GetCurrentThreadWorkerPrivate())
     , mConsole(aConsole)
   {}
 
-  virtual
-  ~ConsoleWorkerRunnable() = default;
+  ~ConsoleWorkerRunnable() override = default;
 
   bool
   Dispatch(JSContext* aCx)
   {
     mWorkerPrivate->AssertIsOnWorkerThread();
 
     if (NS_WARN_IF(!PreDispatch(aCx))) {
       RunBackOnWorkerThreadForCleanup();
@@ -807,17 +804,17 @@ public:
     mWorkerPrivate->AssertIsOnWorkerThread();
     mCallData->AssertIsOnOwningThread();
 
     // Marking this CallData as in use.
     mCallData->mStatus = ConsoleCallData::eInUse;
   }
 
 private:
-  ~ConsoleCallDataWorkerRunnable()
+  ~ConsoleCallDataWorkerRunnable() override
   {
     MOZ_ASSERT(!mCallData);
   }
 
   bool
   PreDispatch(JSContext* aCx) override
   {
     return StoreConsoleData(aCx, mCallData);