diff --git a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
index 73a29a736e..5f43bc63c7 100644
--- a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
+++ b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting.js
@@ -26,6 +26,13 @@
     PAGE_LOADED: 'Page Loaded',
   };
 
+  // Plugin-related reporting constants.
+  const PLUGINS = {
+    TYPE: 'lifecycle',
+    // Reported events - alphabetize below.
+    INSTALLED: 'Plugins installed',
+  };
+
   // Navigation reporting constants.
   const NAVIGATION = {
     TYPE: 'nav-report',
@@ -214,8 +221,10 @@
       }
     },
 
-    pluginsLoaded() {
+    pluginsLoaded(pluginsList) {
       this.timeEnd(TIMER.PLUGINS_LOADED);
+      this.reporter(
+          PLUGINS.TYPE, PLUGINS.INSTALLED, (pluginsList || []).join(','));
     },
 
     /**
diff --git a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
index 3965c7d4e0..de58b6a71f 100644
--- a/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
+++ b/polygerrit-ui/app/elements/core/gr-reporting/gr-reporting_test.html
@@ -162,6 +162,14 @@ limitations under the License.
         ));
       });
 
+      test('pluginsLoaded reports plugins', () => {
+        Gerrit._arePluginsLoaded.returns(true);
+        element.pluginsLoaded(['foo', 'bar']);
+        assert.isTrue(element.defaultReporter.calledWithExactly(
+            'lifecycle', 'Plugins installed', 'foo,bar'
+        ));
+      });
+
       test('caches reports if plugins are not loaded', () => {
         Gerrit._arePluginsLoaded.returns(false);
         element.timeEnd('foo');
diff --git a/polygerrit-ui/app/elements/plugins/gr-endpoint-decorator/gr-endpoint-decorator_test.html b/polygerrit-ui/app/elements/plugins/gr-endpoint-decorator/gr-endpoint-decorator_test.html
index 0f0fab5572..31d3150862 100644
--- a/polygerrit-ui/app/elements/plugins/gr-endpoint-decorator/gr-endpoint-decorator_test.html
+++ b/polygerrit-ui/app/elements/plugins/gr-endpoint-decorator/gr-endpoint-decorator_test.html
@@ -56,18 +56,16 @@ limitations under the License.
       stub('gr-endpoint-decorator', {
         _import: sandbox.stub().returns(Promise.resolve()),
       });
-      // Since _endpoints are global, must reset state.
-      Gerrit._endpoints = new GrPluginEndpoints();
+      Gerrit._resetPlugins();
       container = fixture('basic');
       Gerrit.install(p => plugin = p, '0.1', 'http://some/plugin/url.html');
-      hooks = [];
       // Decoration
       decorationHook = plugin.registerCustomComponent('first', 'some-module');
       // Replacement
       replacementHook = plugin.registerCustomComponent(
           'second', 'other-module', {replace: true});
       // Mimic all plugins loaded.
-      Gerrit._setPluginsCount(0);
+      Gerrit._setPluginsPending([]);
       flush(done);
     });
 
@@ -88,8 +86,10 @@ limitations under the License.
     test('decoration', () => {
       const element =
           container.querySelector('gr-endpoint-decorator[name="first"]');
-      const module = Polymer.dom(element.root).children.find(
+      const modules = Polymer.dom(element.root).children.filter(
           element => element.nodeName === 'SOME-MODULE');
+      assert.equal(modules.length, 1);
+      const [module] = modules;
       assert.isOk(module);
       assert.equal(module['someparam'], 'barbar');
       return decorationHook.getLastAttached().then(element => {
diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-change-actions-js-api_test.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-change-actions-js-api_test.html
index de1ed41fad..747e6b5375 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-change-actions-js-api_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-change-actions-js-api_test.html
@@ -52,8 +52,11 @@ breaking changes to gr-change-actions won’t be noticed.
 
     suite('early init', () => {
       setup(() => {
+        Gerrit._resetPlugins();
         Gerrit.install(p => { plugin = p; }, '0.1',
             'http://test.com/plugins/testplugin/static/test.js');
+        // Mimic all plugins loaded.
+        Gerrit._setPluginsPending([]);
         changeActions = plugin.changeActions();
         element = fixture('basic');
       });
@@ -71,6 +74,7 @@ breaking changes to gr-change-actions won’t be noticed.
 
     suite('normal init', () => {
       setup(() => {
+        Gerrit._resetPlugins();
         element = fixture('basic');
         sinon.stub(element, '_editStatusChanged');
         element.change = {};
@@ -78,6 +82,8 @@ breaking changes to gr-change-actions won’t be noticed.
         Gerrit.install(p => { plugin = p; }, '0.1',
             'http://test.com/plugins/testplugin/static/test.js');
         changeActions = plugin.changeActions();
+        // Mimic all plugins loaded.
+        Gerrit._setPluginsPending([]);
       });
 
       teardown(() => {
diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
index 7d91f413e9..bd5e2a27c5 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
@@ -320,15 +320,19 @@ limitations under the License.
       assert.isTrue(Gerrit._arePluginsLoaded());
     });
 
-    test('_pluginInstalled', done => {
+    test('_pluginInstalled', () => {
+      const pluginsLoadedStub = sandbox.stub();
       stub('gr-reporting', {
-        pluginsLoaded() {
-          done();
-        },
+        pluginsLoaded: (...args) => pluginsLoadedStub(...args),
       });
-      Gerrit._setPluginsCount(2);
-      Gerrit._pluginInstalled();
-      Gerrit._pluginInstalled();
+      const plugins = [
+        'http://test.com/plugins/foo/static/test.js',
+        'http://test.com/plugins/bar/static/test.js',
+      ];
+      Gerrit._setPluginsPending(plugins);
+      Gerrit._pluginInstalled(plugins[0]);
+      Gerrit._pluginInstalled(plugins[1]);
+      assert.isTrue(pluginsLoadedStub.calledWithExactly(['foo', 'bar']));
     });
 
     test('install calls _pluginInstalled', () => {
diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
index 0b2133bfec..3719877106 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
@@ -27,8 +27,12 @@
    */
   let _pluginsPending = {};
 
+  let _pluginsInstalled = [];
+
   let _pluginsPendingCount = -1;
 
+  const UNKNOWN_PLUGIN = 'unknown';
+
   const PANEL_ENDPOINTS_MAPPING = {
     CHANGE_SCREEN_BELOW_COMMIT_INFO_BLOCK: 'change-view-integration',
     CHANGE_SCREEN_BELOW_CHANGE_INFO_BLOCK: 'change-metadata-item',
@@ -37,6 +41,7 @@
   const PLUGIN_LOADING_TIMEOUT_MS = 10000;
 
   let _restAPI;
+
   const getRestAPI = () => {
     if (!_restAPI) {
       _restAPI = document.createElement('gr-rest-api-interface');
@@ -44,6 +49,14 @@
     return _restAPI;
   };
 
+  let _reporting;
+  const getReporting = () => {
+    if (!_reporting) {
+      _reporting = document.createElement('gr-reporting');
+    }
+    return _reporting;
+  };
+
   // TODO (viktard): deprecate in favor of GrPluginRestApi.
   function send(method, url, opt_callback, opt_payload) {
     return getRestAPI().send(method, url, opt_payload).then(response => {
@@ -420,9 +433,13 @@
   if (!app) {
     // No gr-app found (running tests)
     Gerrit._resetPlugins = () => {
-      _resolveAllPluginsLoaded = null;
       _allPluginsPromise = null;
-      Gerrit._setPluginsPending([]);
+      _pluginsInstalled = [];
+      _pluginsPending = {};
+      _pluginsPendingCount = -1;
+      _reporting = null;
+      _resolveAllPluginsLoaded = null;
+      _restAPI = null;
       Gerrit._endpoints = new GrPluginEndpoints();
       for (const k of Object.keys(_plugins)) {
         delete _plugins[k];
@@ -558,7 +575,8 @@
 
   Gerrit._setPluginsPending = function(plugins) {
     _pluginsPending = plugins.reduce((o, url) => {
-      o[getPluginNameFromUrl(url)] = url;
+      // TODO(viktard): Remove guard (@see Issue 8962)
+      o[getPluginNameFromUrl(url) || UNKNOWN_PLUGIN] = url;
       return o;
     }, {});
     Gerrit._setPluginsCount(Object.keys(_pluginsPending).length);
@@ -567,7 +585,7 @@
   Gerrit._setPluginsCount = function(count) {
     _pluginsPendingCount = count;
     if (Gerrit._arePluginsLoaded()) {
-      document.createElement('gr-reporting').pluginsLoaded();
+      getReporting().pluginsLoaded(_pluginsInstalled);
       if (_resolveAllPluginsLoaded) {
         _resolveAllPluginsLoaded();
       }
@@ -585,17 +603,14 @@
   };
 
   Gerrit._pluginInstalled = function(url) {
-    const name = getPluginNameFromUrl(url);
-    if (name && !_pluginsPending[name]) {
-      console.warn(`Unexpected plugin from ${url}!`);
+    const name = getPluginNameFromUrl(url) || UNKNOWN_PLUGIN;
+    if (!_pluginsPending[name]) {
+      console.warn(`Unexpected plugin ${name} installed from ${url}.`);
     } else {
-      if (name) {
-        delete _pluginsPending[name];
-        console.log(`Plugin ${name} installed`);
-      } else {
-        console.log(`Plugin installed from ${url}`);
-      }
+      delete _pluginsPending[name];
+      _pluginsInstalled.push(name);
       Gerrit._setPluginsCount(_pluginsPendingCount - 1);
+      console.log(`Plugin ${name} installed.`);
     }
   };