2 files changed, 58 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/fetch/plugin/plugins.html b/dom/serviceworkers/test/fetch/plugin/plugins.html
new file mode 100644
index 0000000000..b268f6d99e
--- /dev/null
+++ b/dom/serviceworkers/test/fetch/plugin/plugins.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<script>
+  var obj, embed;
+
+  function ok(v, msg) {
+    window.opener.postMessage({status: "ok", result: !!v, message: msg}, "*");
+  }
+
+  function finish() {
+    document.documentElement.removeChild(obj);
+    document.documentElement.removeChild(embed);
+    window.opener.postMessage({status: "done"}, "*");
+  }
+
+  function test_object() {
+    obj = document.createElement("object");
+    obj.setAttribute('data', "object");
+    document.documentElement.appendChild(obj);
+  }
+
+  function test_embed() {
+    embed = document.createElement("embed");
+    embed.setAttribute('src', "embed");
+    document.documentElement.appendChild(embed);
+  }
+
+  navigator.serviceWorker.addEventListener("message", function onMessage(e) {
+    if (e.data.destination === "object") {
+      ok(false, "<object> should not be intercepted");
+    } else if (e.data.destination === "embed") {
+      ok(false, "<embed> should not be intercepted");
+    } else if (e.data.destination === "" && e.data.resource === "foo.txt") {
+      navigator.serviceWorker.removeEventListener("message", onMessage);
+      finish();
+    }
+  });
+
+  test_object();
+  test_embed();
+  // SW will definitely intercept fetch API, use this to see if plugins are
+  // intercepted before fetch().
+  fetch("foo.txt");
+</script>
diff --git a/dom/serviceworkers/test/fetch/plugin/worker.js b/dom/serviceworkers/test/fetch/plugin/worker.js
new file mode 100644
index 0000000000..9849c9e0d5
--- /dev/null
+++ b/dom/serviceworkers/test/fetch/plugin/worker.js
@@ -0,0 +1,15 @@
+self.addEventListener("fetch", function (event) {
+  var resource = event.request.url.split("/").pop();
+  event.waitUntil(
+    clients.matchAll().then(clients => {
+      clients.forEach(client => {
+        if (client.url.includes("plugins.html")) {
+          client.postMessage({
+            destination: event.request.destination,
+            resource,
+          });
+        }
+      });
+    })
+  );
+});