--- a/devtools/server/actors/perf.js
+++ b/devtools/server/actors/perf.js
@@ -136,14 +136,17 @@ exports.PerfActor = ActorClassWithSpec(p
         if (PrivateBrowsingUtils.isWindowPrivate(subject)) {
           this.emit("profile-locked-by-private-browsing");
         }
         break;
       case "last-pb-context-exited":
         this.emit("profile-unlocked-from-private-browsing");
         break;
       case "profiler-started":
+        let param = subject.QueryInterface(Ci.nsIProfilerStartParams);
+        this.emit(topic, param.entries, param.interval, param.features);
+        break;
       case "profiler-stopped":
         this.emit(topic);
         break;
     }
   }
 });

--- a/devtools/server/tests/browser/browser.ini
+++ b/devtools/server/tests/browser/browser.ini
@@ -71,16 +71,17 @@ skip-if = e10s # Bug 1183605 - devtools/
 [browser_markers-parse-html.js]
 [browser_markers-styles.js]
 [browser_markers-timestamp.js]
 [browser_navigateEvents.js]
 skip-if = e10s # Bug 1183605 - devtools/server/tests/browser/ tests are still disabled in E10S
 [browser_perf-01.js]
 [browser_perf-02.js]
 [browser_perf-03.js]
+[browser_perf-04.js]
 [browser_perf-allocation-data.js]
 skip-if = e10s # Bug 1183605 - devtools/server/tests/browser/ tests are still disabled in E10S
 [browser_perf-profiler-01.js]
 [browser_perf-profiler-02.js]
 skip-if = true # Needs to be updated for async actor destruction
 [browser_perf-profiler-03.js]
 skip-if = true # Needs to be updated for async actor destruction
 [browser_perf-realtime-markers.js]

new file mode 100644
--- /dev/null
+++ b/devtools/server/tests/browser/browser_perf-04.js
@@ -0,0 +1,36 @@
+/* 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";
+
+/**
+ * Run through a series of basic recording actions for the perf actor.
+ */
+add_task(async function() {
+  const {front, client} = await initPerfFront();
+
+  // Assert the initial state.
+  is(await front.isSupportedPlatform(), true,
+    "This test only runs on supported platforms.");
+  is(await front.isLockedForPrivateBrowsing(), false,
+    "The browser is not in private browsing mode.");
+  is(await front.isActive(), false,
+    "The profiler is not active yet.");
+
+  front.once("profiler-started", (entries, interval, features) => {
+    is(entries, 1000, "Should apply entries by startProfiler");
+    is(interval, 0.1, "Should apply interval by startProfiler");
+    is(features, 0x82, "Should apply features by startProfiler");
+  });
+
+  // Start the profiler.
+  await front.startProfiler({ entries: 1000, interval: 0.1,
+                              features: ["js", "stackwalk"] });
+
+  is(await front.isActive(), true, "The profiler is active.");
+
+  // clean up
+  await front.stopProfilerAndDiscardProfile();
+  await front.destroy();
+  await client.close();
+});

--- a/devtools/shared/specs/perf.js
+++ b/devtools/shared/specs/perf.js
@@ -1,21 +1,24 @@
 /* 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";
 
-const { Option, RetVal, generateActorSpec } = require("devtools/shared/protocol");
+const { Arg, Option, RetVal, generateActorSpec } = require("devtools/shared/protocol");
 
 const perfDescription = {
   typeName: "perf",
 
   events: {
     "profiler-started": {
-      type: "profiler-started"
+      type: "profiler-started",
+      entries: Arg(0, "number"),
+      interval: Arg(1, "number"),
+      features: Arg(2, "number"),
     },
     "profiler-stopped": {
       type: "profiler-stopped"
     },
     "profile-locked-by-private-browsing": {
       type: "profile-locked-by-private-browsing"
     },
     "profile-unlocked-from-private-browsing": {