I am using Safari v17+ but still not working for me. [ { "id" : 1, "priority" : 1, "action" : { "type" : "redirect", "redirect": { "regexSubstitution": "xy.abc.net" } }, "condition" : { "regexFilter": "(m\\/)", "resourceTypes" : [ "main_frame" ] } } ] This is not working but the redirect supports "url" . I have already added the below permissions. "host_permissions": [ "<all_urls>" ], "permissions": [ "activeTab", "scripting", "declarativeNetRequestWithHostAccess" ] Can anyone share some snippet for whom it is working. Am I missing anything?