diff --git a/browser/ui/webui/brave_adblock_ui.cc b/browser/ui/webui/brave_adblock_ui.cc
index bd3b23e9b7f..db49ab02b45 100644
--- a/browser/ui/webui/brave_adblock_ui.cc
+++ b/browser/ui/webui/brave_adblock_ui.cc
@@ -20,13 +20,11 @@
 #include "brave/components/brave_shields/browser/ad_block_service_helper.h"
 #include "brave/components/brave_shields/browser/ad_block_subscription_service_manager.h"
 #include "brave/components/brave_shields/browser/ad_block_subscription_service_manager_observer.h"
-#include "brave/components/brave_shields/common/brave_shield_constants.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_navigator_params.h"
 #include "chrome/browser/ui/singleton_tabs.h"
 #include "components/grit/brave_components_resources.h"
 #include "content/public/browser/web_ui_message_handler.h"
-#include "net/base/filename_util.h"
 
 namespace {
 
@@ -258,14 +256,9 @@ void AdblockDOMHandler::HandleViewSubscriptionSource(
     return;
   }
 
-  // TODO(bridiver) - the ui shouldn't have to figure this out
-  const auto cached_list_path =
-      g_brave_browser_process->ad_block_service()
-          ->subscription_service_manager()
-          ->GetSubscriptionPath(list_url)
-          .AppendASCII(brave_shields::kCustomSubscriptionListText);
-
-  const GURL file_url = net::FilePathToFileURL(cached_list_path);
+  const GURL file_url = g_brave_browser_process->ad_block_service()
+                            ->subscription_service_manager()
+                            ->GetListTextFileUrl(list_url);
 
   auto* browser =
       chrome::FindBrowserWithWebContents(web_ui()->GetWebContents());
diff --git a/components/brave_shields/browser/ad_block_subscription_service_manager.cc b/components/brave_shields/browser/ad_block_subscription_service_manager.cc
index 2345a3f645e..c1b4b7c4434 100644
--- a/components/brave_shields/browser/ad_block_subscription_service_manager.cc
+++ b/components/brave_shields/browser/ad_block_subscription_service_manager.cc
@@ -21,11 +21,13 @@
 #include "brave/components/brave_shields/browser/ad_block_service_helper.h"
 #include "brave/components/brave_shields/browser/ad_block_subscription_service.h"
 #include "brave/components/brave_shields/browser/ad_block_subscription_service_manager_observer.h"
+#include "brave/components/brave_shields/common/brave_shield_constants.h"
 #include "brave/components/brave_shields/common/pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "content/public/browser/browser_task_traits.h"
 #include "crypto/sha2.h"
+#include "net/base/filename_util.h"
 
 namespace brave_shields {
 
@@ -85,6 +87,16 @@ base::FilePath AdBlockSubscriptionServiceManager::GetSubscriptionPath(
   return subscription_path_.AppendASCII(pathsafe_id);
 }
 
+GURL AdBlockSubscriptionServiceManager::GetListTextFileUrl(
+    const SubscriptionIdentifier id) const {
+  base::FilePath cached_list_path = GetSubscriptionPath(id).AppendASCII(
+      brave_shields::kCustomSubscriptionListText);
+
+  const GURL file_url = net::FilePathToFileURL(cached_list_path);
+
+  return file_url;
+}
+
 void AdBlockSubscriptionServiceManager::CreateSubscription(
     const GURL& list_url) {
   FilterListSubscriptionInfo info;
diff --git a/components/brave_shields/browser/ad_block_subscription_service_manager.h b/components/brave_shields/browser/ad_block_subscription_service_manager.h
index 0fd0e5010df..fa70207baa6 100644
--- a/components/brave_shields/browser/ad_block_subscription_service_manager.h
+++ b/components/brave_shields/browser/ad_block_subscription_service_manager.h
@@ -50,8 +50,14 @@ class AdBlockSubscriptionServiceManager {
       const base::FilePath& user_data_dir);
   ~AdBlockSubscriptionServiceManager();
 
+  // Returns the directory used to store cached list data for the given
+  // subscription.
   base::FilePath GetSubscriptionPath(const SubscriptionIdentifier id) const;
 
+  // Returns a `file://` URL that points directly to the cached list text file
+  // used for the given subscription.
+  GURL GetListTextFileUrl(const SubscriptionIdentifier id) const;
+
   std::vector<FilterListSubscriptionInfo> GetSubscriptions() const;
   void EnableSubscription(const SubscriptionIdentifier& id, bool enabled);
   void DeleteSubscription(const SubscriptionIdentifier& id);