diff --git a/.eslintignore b/.eslintignore
index b6a27c783443..b4c6ab83cce6 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -181,6 +181,7 @@ devtools/server/tests/unit/setBreakpoint*
 devtools/server/tests/unit/sourcemapped.js
 
 # dom/ exclusions
+dom/abort/**
 dom/animation/**
 dom/archivereader/**
 dom/asmjscache/**
diff --git a/dom/abort/tests/moz.build b/dom/abort/tests/moz.build
index 3b13ba431aa9..9df9dda57ecd 100644
--- a/dom/abort/tests/moz.build
+++ b/dom/abort/tests/moz.build
@@ -5,3 +5,5 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 MOCHITEST_MANIFESTS += ['mochitest.ini']
+
+XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
diff --git a/dom/abort/tests/unit/test_abort.js b/dom/abort/tests/unit/test_abort.js
new file mode 100644
index 000000000000..1c355512c672
--- /dev/null
+++ b/dom/abort/tests/unit/test_abort.js
@@ -0,0 +1,8 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function run_test() {
+  let ac = new AbortController();
+  do_check_true(ac instanceof AbortController);
+  do_check_true(ac.signal instanceof AbortSignal);
+}
diff --git a/dom/abort/tests/unit/xpcshell.ini b/dom/abort/tests/unit/xpcshell.ini
new file mode 100644
index 000000000000..219daa771ab4
--- /dev/null
+++ b/dom/abort/tests/unit/xpcshell.ini
@@ -0,0 +1,5 @@
+[DEFAULT]
+head =
+support-files =
+
+[test_abort.js]
diff --git a/dom/webidl/AbortController.webidl b/dom/webidl/AbortController.webidl
index 10cd4b67d6e3..19a8f8a63733 100644
--- a/dom/webidl/AbortController.webidl
+++ b/dom/webidl/AbortController.webidl
@@ -7,7 +7,7 @@
  * https://dom.spec.whatwg.org/#abortcontroller
  */
 
-[Constructor(), Exposed=(Window,Worker)]
+[Constructor(), Exposed=(Window,Worker,System)]
 interface AbortController {
   readonly attribute AbortSignal signal;
 
diff --git a/dom/webidl/AbortSignal.webidl b/dom/webidl/AbortSignal.webidl
index be8adc70b4b4..6b66f76c4cd9 100644
--- a/dom/webidl/AbortSignal.webidl
+++ b/dom/webidl/AbortSignal.webidl
@@ -7,7 +7,7 @@
  * https://dom.spec.whatwg.org/#abortsignal
  */
 
-[Exposed=(Window,Worker)]
+[Exposed=(Window,Worker,System)]
 interface AbortSignal : EventTarget {
   readonly attribute boolean aborted;