diff --git a/swh/web/assets/src/bundles/browse/origin-search.js b/swh/web/assets/src/bundles/browse/origin-search.js
--- a/swh/web/assets/src/bundles/browse/origin-search.js
+++ b/swh/web/assets/src/bundles/browse/origin-search.js
@@ -84,7 +84,7 @@
 
 function escapeStringRegexp(str) {
   let matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
-  return str.replace(matchOperatorsRe, '\\\\\\$&');
+  return str.replace(matchOperatorsRe, '%5C$&');
 }
 
 function searchOrigins(patterns, limit, searchOffset, offset) {
diff --git a/swh/web/browse/views/origin.py b/swh/web/browse/views/origin.py
--- a/swh/web/browse/views/origin.py
+++ b/swh/web/browse/views/origin.py
@@ -182,8 +182,6 @@
     regexp = request.GET.get('regexp', 'false')
     with_visit = request.GET.get('with_visit', 'false')
 
-    url_pattern = url_pattern.replace('///', '\\')
-
     try:
         results = service.search_origin(url_pattern, offset, limit,
                                         bool(strtobool(regexp)),