1 files changed, 45 insertions, 0 deletions
diff --git a/browser/base/content/test/plugins/browser_bug797677.js b/browser/base/content/test/plugins/browser_bug797677.js
new file mode 100644
index 0000000000..bcb35d161e
--- /dev/null
+++ b/browser/base/content/test/plugins/browser_bug797677.js
@@ -0,0 +1,45 @@
+var gTestRoot = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content/",
+  "http://127.0.0.1:8888/"
+);
+var gTestBrowser = null;
+var gConsoleErrors = 0;
+
+add_task(async function() {
+  registerCleanupFunction(function() {
+    Services.console.unregisterListener(errorListener);
+    gBrowser.removeCurrentTab();
+    window.focus();
+    gTestBrowser = null;
+  });
+
+  gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser);
+  gTestBrowser = gBrowser.selectedBrowser;
+
+  let errorListener = {
+    observe(aMessage) {
+      if (aMessage.message.includes("NS_ERROR_FAILURE")) {
+        gConsoleErrors++;
+      }
+    },
+  };
+  Services.console.registerListener(errorListener);
+
+  await promiseTabLoadEvent(
+    gBrowser.selectedTab,
+    gTestRoot + "plugin_bug797677.html"
+  );
+
+  let pluginInfo = await promiseForPluginInfo("plugin");
+  is(
+    pluginInfo.displayedType,
+    Ci.nsIObjectLoadingContent.TYPE_NULL,
+    "plugin should not have been found."
+  );
+
+  await SpecialPowers.spawn(gTestBrowser, [], function() {
+    let plugin = content.document.getElementById("plugin");
+    ok(plugin, "plugin should be in the page");
+  });
+  is(gConsoleErrors, 0, "should have no console errors");
+});