1 files changed, 16 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_mute.js b/toolkit/content/tests/browser/browser_mute.js
new file mode 100644
index 000000000..f4829b808
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_mute.js
@@ -0,0 +1,16 @@
+const PAGE = "data:text/html,page";
+
+function* test_on_browser(browser) {
+  ok(!browser.audioMuted, "Audio should not be muted by default");
+  browser.mute();
+  ok(browser.audioMuted, "Audio should be muted now");
+  browser.unmute();
+  ok(!browser.audioMuted, "Audio should be unmuted now");
+}
+
+add_task(function*() {
+  yield BrowserTestUtils.withNewTab({
+    gBrowser,
+    url: PAGE,
+  }, test_on_browser);
+});