--- a/toolkit/components/url-classifier/nsUrlClassifierDBService.cpp
+++ b/toolkit/components/url-classifier/nsUrlClassifierDBService.cpp
@@ -1098,21 +1098,17 @@ nsUrlClassifierLookupCallback::HandleRes
 // to nsIURIClassifier enums.
 
 class nsUrlClassifierClassifyCallback final : public nsIUrlClassifierCallback
 {
 public:
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSIURLCLASSIFIERCALLBACK
 
-  nsUrlClassifierClassifyCallback(nsIURIClassifierCallback *c,
-                                  bool checkMalware,
-                                  bool checkPhishing,
-                                  bool checkTracking,
-                                  bool checkBlocked)
+  explicit nsUrlClassifierClassifyCallback(nsIURIClassifierCallback *c)
     : mCallback(c)
     {}
 
 private:
   ~nsUrlClassifierClassifyCallback() {}
 
   nsCOMPtr<nsIURIClassifierCallback> mCallback;
 };
@@ -1381,18 +1377,17 @@ nsUrlClassifierDBService::Classify(nsIPr
 
   if (!(mCheckMalware || mCheckPhishing || aTrackingProtectionEnabled ||
         mCheckBlockedURIs)) {
     *result = false;
     return NS_OK;
   }
 
   RefPtr<nsUrlClassifierClassifyCallback> callback =
-    new nsUrlClassifierClassifyCallback(c, mCheckMalware, mCheckPhishing,
-                                        mCheckTracking, mCheckBlockedURIs);
+    new nsUrlClassifierClassifyCallback(c);
   if (!callback) return NS_ERROR_OUT_OF_MEMORY;
 
   nsAutoCString tables;
   BuildTables(aTrackingProtectionEnabled, tables);
 
   nsresult rv = LookupURI(aPrincipal, tables, callback, false, result);
   if (rv == NS_ERROR_MALFORMED_URI) {
     *result = false;