1 files changed, 18 insertions, 0 deletions
diff --git a/toolkit/components/antitracking/test/browser/sharedWorker.js b/toolkit/components/antitracking/test/browser/sharedWorker.js
new file mode 100644
index 0000000000..01188ed10a
--- /dev/null
+++ b/toolkit/components/antitracking/test/browser/sharedWorker.js
@@ -0,0 +1,18 @@
+let ports = 0;
+self.onconnect = e => {
+  ++ports;
+  e.ports[0].onmessage = event => {
+    if (event.data === "count") {
+      e.ports[0].postMessage(ports);
+      return;
+    }
+
+    if (event.data === "close") {
+      self.close();
+      return;
+    }
+
+    // Error.
+    e.ports[0].postMessage(-1);
+  };
+};