1 files changed, 16 insertions, 0 deletions
diff --git a/toolkit/components/antitracking/test/browser/matchAll.js b/toolkit/components/antitracking/test/browser/matchAll.js
new file mode 100644
index 0000000000..8f112b0804
--- /dev/null
+++ b/toolkit/components/antitracking/test/browser/matchAll.js
@@ -0,0 +1,16 @@
+self.addEventListener("message", async e => {
+  let clients = await self.clients.matchAll({
+    type: "window",
+    includeUncontrolled: true,
+  });
+
+  let hasWindow = false;
+  for (let client of clients) {
+    if (e.data == client.url) {
+      hasWindow = true;
+      break;
+    }
+  }
+
+  e.source.postMessage(hasWindow);
+});