add user script

startpage.user.js

@@ -0,0 +1,38 @@
+// ==UserScript==
+// @name     Startpage Bangs
+// @version  1
+// @grant    none
+// @run-at   document-start
+// @include  https://*.startpage.com/*
+// ==/UserScript==
+
+fetch('https://s3.sbruder.de/cdn/bangs/bangs.json')
+  .then(text => text.json())
+  .then(bangs => {
+  const urlParams = new URLSearchParams(window.location.search)
+  const searchQuery = urlParams.get('query')
+
+  let matchBang = null
+  let parsedBang = null
+
+  matchBang = searchQuery.match(/(.*) \!(.*)/)
+  if (matchBang !== null) {
+    parsedBang = {
+      'bang': matchBang[2],
+      'query': matchBang[1]
+    }
+  }
+
+  matchBang = searchQuery.match(/\!(.*) (.*)/)
+  if (matchBang !== null) {
+    parsedBang = {
+      'bang': matchBang[1],
+      'query': matchBang[2]
+    }
+  }
+
+  if (parsedBang !== null) {
+    redirectURL = bangs[parsedBang.bang].replace('%s', parsedBang.query)
+    window.location.replace(redirectURL);
+  }
+})