From d0e303ca19bf35b876ddcdff48e658ea5eeb0bc7 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Thu, 10 Apr 2025 07:32:09 -0400
Subject: [PATCH] Fix regression in response header filtering

Related commit:
https://github.com/gorhill/uBlock/commit/8b696a691a0871da8200d1806300842d988a4326
---
 src/js/httpheader-filtering.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/js/httpheader-filtering.js b/src/js/httpheader-filtering.js
index 9d09543ab..c5aa918ec 100644
--- a/src/js/httpheader-filtering.js
+++ b/src/js/httpheader-filtering.js
@@ -145,8 +145,8 @@ httpheaderFilteringEngine.apply = function(fctxt, headers) {
     }
 
     // Split filters in different groups
-    const filters = new Map();
-    const exceptions = new Map();
+    const filters = new Set();
+    const exceptions = new Set();
     for ( const s of all ) {
         const selector = s.slice(1);
         if ( s.charCodeAt(0) === 0x2D /* - */ ) {