1 files changed, 35 insertions, 0 deletions
diff --git a/browser/extensions/webcompat/injections/js/bug1448747-fastclick-shim.js b/browser/extensions/webcompat/injections/js/bug1448747-fastclick-shim.js
new file mode 100644
index 0000000000..7a8e85f538
--- /dev/null
+++ b/browser/extensions/webcompat/injections/js/bug1448747-fastclick-shim.js
@@ -0,0 +1,35 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * Bug 1448747 - Neutralize FastClick
+ *
+ * The patch is applied on sites using FastClick library
+ * to make sure `FastClick.notNeeded` returns `true`.
+ * This allows to disable FastClick and fix various breakage caused
+ * by the library (mainly non-functioning drop-down lists).
+ */
+
+/* globals exportFunction */
+
+(function () {
+  const proto = CSS2Properties.prototype.wrappedJSObject;
+  const descriptor = Object.getOwnPropertyDescriptor(proto, "touchAction");
+  const { get } = descriptor;
+
+  descriptor.get = exportFunction(function () {
+    try {
+      throw Error();
+    } catch (e) {
+      if (e.stack?.includes("notNeeded")) {
+        return "none";
+      }
+    }
+    return get.call(this);
+  }, window);
+
+  Object.defineProperty(proto, "touchAction", descriptor);
+})();