--- a/devtools/server/actors/object.js
+++ b/devtools/server/actors/object.js
@@ -251,33 +251,44 @@ ObjectActor.prototype = {
   },
 
   /**
    * Handle a protocol request to provide the prototype and own properties of
    * the object.
    */
   onPrototypeAndProperties: function () {
     let ownProperties = Object.create(null);
+    let ownSymbols = [];
     let names;
+    let symbols;
     try {
       names = this.obj.getOwnPropertyNames();
+      symbols = this.obj.getOwnPropertySymbols();
     } catch (ex) {
       // The above can throw if this.obj points to a dead object.
       // TODO: we should use Cu.isDeadWrapper() - see bug 885800.
       return { from: this.actorID,
                prototype: this.hooks.createValueGrip(null),
-               ownProperties: ownProperties,
+               ownProperties,
+               ownSymbols,
                safeGetterValues: Object.create(null) };
     }
     for (let name of names) {
       ownProperties[name] = this._propertyDescriptor(name);
     }
+    for (let sym of symbols) {
+      ownSymbols.push({
+        name: sym.toString(),
+        descriptor: this._propertyDescriptor(sym)
+      });
+    }
     return { from: this.actorID,
              prototype: this.hooks.createValueGrip(this.obj.proto),
-             ownProperties: ownProperties,
+             ownProperties,
+             ownSymbols,
              safeGetterValues: this._findSafeGetterValues(names) };
   },
 
   /**
    * Find the safe getter values for the current Debugger.Object, |this.obj|.
    *
    * @private
    * @param array ownProperties

new file mode 100644
--- /dev/null
+++ b/devtools/server/tests/unit/test_objectgrips-16.js
@@ -0,0 +1,104 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* eslint-disable no-shadow, max-nested-callbacks */
+
+"use strict";
+
+var gDebuggee;
+var gClient;
+var gThreadClient;
+var gCallback;
+
+function run_test() {
+  run_test_with_server(DebuggerServer, function () {
+    run_test_with_server(WorkerDebuggerServer, do_test_finished);
+  });
+  do_test_pending();
+}
+
+async function run_test_with_server(server, callback) {
+  gCallback = callback;
+  initTestDebuggerServer(server);
+  gDebuggee = addTestGlobal("test-grips", server);
+  gDebuggee.eval(function stopMe(arg1) {
+    debugger;
+  }.toString());
+
+  gClient = new DebuggerClient(server.connectPipe());
+  await gClient.connect();
+  const [,, threadClient] = await attachTestTabAndResume(gClient, "test-grips");
+  gThreadClient = threadClient;
+  test_symbol_grip();
+}
+
+function test_symbol_grip() {
+  gThreadClient.addOneTimeListener("paused", function (event, packet) {
+    let args = packet.frame.arguments;
+
+    do_check_eq(args[0].class, "Object");
+
+    let objClient = gThreadClient.pauseGrip(args[0]);
+    objClient.getPrototypeAndProperties(function (response) {
+      do_check_eq(response.ownProperties.x.configurable, true);
+      do_check_eq(response.ownProperties.x.enumerable, true);
+      do_check_eq(response.ownProperties.x.writable, true);
+      do_check_eq(response.ownProperties.x.value, 10);
+
+      const [
+        firstUnnamedSymbol,
+        secondUnnamedSymbol,
+        namedSymbol,
+        iteratorSymbol,
+      ] = response.ownSymbols;
+
+      do_check_eq(firstUnnamedSymbol.name, "Symbol()");
+      do_check_eq(firstUnnamedSymbol.descriptor.configurable, true);
+      do_check_eq(firstUnnamedSymbol.descriptor.enumerable, true);
+      do_check_eq(firstUnnamedSymbol.descriptor.writable, true);
+      do_check_eq(firstUnnamedSymbol.descriptor.value, "first unnamed symbol");
+
+      do_check_eq(secondUnnamedSymbol.name, "Symbol()");
+      do_check_eq(secondUnnamedSymbol.descriptor.configurable, true);
+      do_check_eq(secondUnnamedSymbol.descriptor.enumerable, true);
+      do_check_eq(secondUnnamedSymbol.descriptor.writable, true);
+      do_check_eq(secondUnnamedSymbol.descriptor.value, "second unnamed symbol");
+
+      do_check_eq(namedSymbol.name, "Symbol(named)");
+      do_check_eq(namedSymbol.descriptor.configurable, true);
+      do_check_eq(namedSymbol.descriptor.enumerable, true);
+      do_check_eq(namedSymbol.descriptor.writable, true);
+      do_check_eq(namedSymbol.descriptor.value, "named symbol");
+
+      do_check_eq(iteratorSymbol.name, "Symbol(Symbol.iterator)");
+      do_check_eq(iteratorSymbol.descriptor.configurable, true);
+      do_check_eq(iteratorSymbol.descriptor.enumerable, true);
+      do_check_eq(iteratorSymbol.descriptor.writable, true);
+      do_check_eq(iteratorSymbol.descriptor.value.class, "Function");
+
+      do_check_true(response.prototype != undefined);
+
+      let protoClient = gThreadClient.pauseGrip(response.prototype);
+      protoClient.getOwnPropertyNames(function (response) {
+        do_check_true(response.ownPropertyNames.toString != undefined);
+
+        gThreadClient.resume(function () {
+          gClient.close().then(gCallback);
+        });
+      });
+    });
+  });
+
+  gDebuggee.eval(`
+    stopMe({
+      [Symbol()]: "first unnamed symbol",
+      [Symbol()]: "second unnamed symbol",
+      [Symbol("named")] : "named symbol",
+      [Symbol.iterator] : function* () {
+        yield 1;
+        yield 2;
+      },
+      x: 10,
+    });
+  `);
+}
+

--- a/devtools/server/tests/unit/xpcshell.ini
+++ b/devtools/server/tests/unit/xpcshell.ini
@@ -166,16 +166,17 @@ reason = only ran on B2G
 [test_objectgrips-08.js]
 [test_objectgrips-09.js]
 [test_objectgrips-10.js]
 [test_objectgrips-11.js]
 [test_objectgrips-12.js]
 [test_objectgrips-13.js]
 [test_objectgrips-14.js]
 [test_objectgrips-15.js]
+[test_objectgrips-16.js]
 [test_promise_state-01.js]
 [test_promise_state-02.js]
 [test_promise_state-03.js]
 [test_interrupt.js]
 [test_stepping-01.js]
 [test_stepping-02.js]
 [test_stepping-03.js]
 [test_stepping-04.js]