From 052c36aada9f8455f3a777941ebf5f8ef2f974b3 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Fri, 22 Aug 2025 12:35:13 -0400
Subject: [PATCH] [mv3] Fix placeholder references for regexSubstitution

---
 platform/mv3/extension/js/ubo-parser.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/mv3/extension/js/ubo-parser.js b/platform/mv3/extension/js/ubo-parser.js
index 81f3550d3..c4f179fdb 100644
--- a/platform/mv3/extension/js/ubo-parser.js
+++ b/platform/mv3/extension/js/ubo-parser.js
@@ -505,7 +505,7 @@ export function parseNetworkFilter(parser) {
             if ( parsed.re ) { return; }
             rule.action.type = 'redirect';
             rule.action.redirect = {
-                regexSubstitution: parsed.replacement,
+                regexSubstitution: parsed.replacement.replace(/\$(\d+)/g, '\\$1'),
             };
             break;
         }