diff -r 000000000000 -r 6474c204b198 toolkit/forgetaboutsite/test/browser/browser_clearplugindata.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/forgetaboutsite/test/browser/browser_clearplugindata.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,109 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+Components.utils.import("resource://gre/modules/ForgetAboutSite.jsm");
+
+// Test clearing plugin data by domain using ForgetAboutSite.
+const testURL = "http://mochi.test:8888/browser/toolkit/forgetaboutsite/test/browser/browser_clearplugindata.html";
+
+const pluginHostIface = Ci.nsIPluginHost;
+var pluginHost = Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost);
+pluginHost.QueryInterface(pluginHostIface);
+
+var pluginTag;
+
+function stored(needles) {
+  var something = pluginHost.siteHasData(this.pluginTag, null);
+  if (!needles)
+    return something;
+
+  if (!something)
+    return false;
+
+  for (var i = 0; i < needles.length; ++i) {
+    if (!pluginHost.siteHasData(this.pluginTag, needles[i]))
+      return false;
+  }
+  return true;
+}
+
+function setTestPluginEnabledState(newEnabledState, plugin) {
+  var oldEnabledState = plugin.enabledState;
+  plugin.enabledState = newEnabledState;
+  SimpleTest.registerCleanupFunction(function() {
+    plugin.enabledState = oldEnabledState;
+  });
+}
+
+function test() {
+  waitForExplicitFinish();
+
+  var tags = pluginHost.getPluginTags();
+
+  // Find the test plugin
+  for (var i = 0; i < tags.length; i++)
+  {
+    if (tags[i].name == "Test Plug-in")
+    {
+      pluginTag = tags[i];
+    }
+  }
+  if (!pluginTag) {
+    ok(false, "Test Plug-in not available, can't run test");
+    finish();
+  }
+  setTestPluginEnabledState(Ci.nsIPluginTag.STATE_ENABLED, pluginTag);
+
+  executeSoon(do_test);
+}
+
+function setFinishedCallback(callback)
+{
+  let testPage = gBrowser.selectedBrowser.contentWindow.wrappedJSObject;
+  testPage.testFinishedCallback = function() {
+    setTimeout(function() {
+      info("got finished callback");
+      callback();
+    }, 0);
+  }
+}
+
+function do_test()
+{
+  // Load page to set data for the plugin.
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function () {
+    gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
+
+    setFinishedCallback(function() {
+      ok(stored(["192.168.1.1","foo.com","nonexistent.foo.com","bar.com","localhost"]),
+        "Data stored for sites");
+
+      // Clear data for "foo.com" and its subdomains.
+      ForgetAboutSite.removeDataFromDomain("foo.com");
+      ok(stored(["bar.com","192.168.1.1","localhost"]), "Data stored for sites");
+      ok(!stored(["foo.com"]), "Data cleared for foo.com");
+      ok(!stored(["bar.foo.com"]), "Data cleared for subdomains of foo.com");
+
+      // Clear data for "bar.com" using a subdomain.
+      ForgetAboutSite.removeDataFromDomain("foo.bar.com");
+      ok(!stored(["bar.com"]), "Data cleared for bar.com");
+
+      // Clear data for "192.168.1.1".
+      ForgetAboutSite.removeDataFromDomain("192.168.1.1");
+      ok(!stored(["192.168.1.1"]), "Data cleared for 192.168.1.1");
+
+      // Clear data for "localhost".
+      ForgetAboutSite.removeDataFromDomain("localhost");
+      ok(!stored(null), "All data cleared");
+
+      gBrowser.removeCurrentTab();
+
+      executeSoon(finish);
+    });
+  }, true);
+  content.location = testURL;
+}
+