1 files changed, 15 insertions, 0 deletions
diff --git a/toolkit/components/resistfingerprinting/tests/browser/serviceWorker.js b/toolkit/components/resistfingerprinting/tests/browser/serviceWorker.js
new file mode 100644
index 0000000000..e9ee00cbf8
--- /dev/null
+++ b/toolkit/components/resistfingerprinting/tests/browser/serviceWorker.js
@@ -0,0 +1,15 @@
+self.addEventListener("message", async e => {
+  let res = {};
+
+  switch (e.data.type) {
+    case "GetHWConcurrency":
+      res.result = "OK";
+      res.value = navigator.hardwareConcurrency;
+      break;
+
+    default:
+      res.result = "ERROR";
+  }
+
+  e.source.postMessage(res);
+});