diff --git a/web/static/src/ts/core/Widget.ts b/web/static/src/ts/core/Widget.ts
index 0eb93031..acc7f7b3 100644
--- a/web/static/src/ts/core/Widget.ts
+++ b/web/static/src/ts/core/Widget.ts
@@ -174,6 +174,9 @@ export class Widget<T extends WEnv, Props> extends EventBus {
    * case, it will simply update the state and will not rerender
    */
   async updateState(nextState: Object) {
+    if (Object.keys(nextState).length === 0) {
+      return;
+    }
     for (let key in nextState) {
       if (key in this.state) {
         this.state[key] = nextState[key];
diff --git a/web/static/src/ts/core/router.ts b/web/static/src/ts/core/router.ts
index d4b00d2a..f321c824 100644
--- a/web/static/src/ts/core/router.ts
+++ b/web/static/src/ts/core/router.ts
@@ -58,7 +58,7 @@ export class Router extends EventBus implements IRouter {
 
   getQuery(): Query {
     const query = {};
-    for (let part of window.location.hash.slice(1).split("?")) {
+    for (let part of window.location.hash.slice(1).split("&")) {
       let [key, value] = part.split("=");
       query[key] = value;
     }
diff --git a/web/static/src/ts/env.ts b/web/static/src/ts/env.ts
index ae7a1fa4..241101c2 100644
--- a/web/static/src/ts/env.ts
+++ b/web/static/src/ts/env.ts
@@ -65,7 +65,7 @@ export const makeEnvironment = memoize(async function(): Promise<Env> {
   const qweb = new QWeb();
   const router = new Router();
   const ajax = new Ajax();
-  const actionManager = new ActionManager(router, actionRegistry);
+  const actionManager = new ActionManager(actionRegistry);
   const notifications = new NotificationManager();
 
   // demo data
diff --git a/web/static/src/ts/main.ts b/web/static/src/ts/main.ts
index fab9ca11..a9d07f65 100644
--- a/web/static/src/ts/main.ts
+++ b/web/static/src/ts/main.ts
@@ -3,7 +3,7 @@
 import { debounce } from "./core/utils";
 import { makeEnvironment } from "./env";
 import { Root } from "./widgets/root";
-import { MenuItem, processMenuItems } from "./misc/menu_helpers";
+import { BaseMenuItem, processMenuItems } from "./misc/menu_helpers";
 
 //------------------------------------------------------------------------------
 // Application bootstrapping
@@ -13,7 +13,7 @@ document.addEventListener("DOMContentLoaded", async function() {
   const env = await makeEnvironment();
 
   // menu processing
-  const menuItems: MenuItem[] = (<any>window).odoo.menus;
+  const menuItems: BaseMenuItem[] = (<any>window).odoo.menus;
   const menuInfo = processMenuItems(menuItems);
   delete (<any>window).odoo.menus; // overkill?
 
diff --git a/web/static/src/ts/misc/menu_helpers.ts b/web/static/src/ts/misc/menu_helpers.ts
index 5c111edd..9a7459ea 100644
--- a/web/static/src/ts/misc/menu_helpers.ts
+++ b/web/static/src/ts/misc/menu_helpers.ts
@@ -1,3 +1,5 @@
+import { findInTree } from "../core/utils";
+
 //------------------------------------------------------------------------------
 // Types
 //------------------------------------------------------------------------------
@@ -8,18 +10,17 @@ export interface BaseMenuItem {
   parent_id: number | false;
   action: string | false;
   icon: string | false;
+  children: BaseMenuItem[];
 }
 
 export interface MenuItem extends BaseMenuItem {
+  menuId: number;
+  actionId: number;
   children: MenuItem[];
 }
 
-export interface ProcessedMenuItem extends BaseMenuItem {
-  children: number[];
-}
-
 export interface MenuInfo {
-  menuMap: { [key: number]: ProcessedMenuItem | undefined };
+  menuMap: { [key: number]: MenuItem | undefined };
   roots: number[];
 }
 
@@ -27,28 +28,90 @@ export interface MenuInfo {
 // Helpers
 //------------------------------------------------------------------------------
 
-export function processMenuItems(items: MenuItem[]): MenuInfo {
+export function processMenuItems(items: BaseMenuItem[]): MenuInfo {
   const menuMap: MenuInfo["menuMap"] = {};
   const roots: number[] = [];
 
+  // build MenuItems
   for (let root of items) {
     roots.push(root.id);
-    addToMap(root);
+    addToMap(root, root.id);
   }
 
-  function addToMap(m: MenuItem) {
-    let processedItem: ProcessedMenuItem = Object.assign({}, m, {
-      children: m.children.map(c => c.id)
-    });
-    menuMap[processedItem.id] = processedItem;
-    m.children.forEach(addToMap);
+  function addToMap(m: BaseMenuItem, menuId: number) {
+    let item: MenuItem = Object.assign({ menuId, actionId: -1 }, <MenuItem>m);
+    menuMap[item.id] = item;
+    m.children.forEach(c => addToMap(c, menuId));
+  }
+
+  // add proper actionId to every menuitems
+  for (let menuId in menuMap) {
+    const menu = menuMap[menuId]!;
+    let menuWithAction = menu && findInTree(menu, m => Boolean(m.action));
+    if (menuWithAction) {
+      menu.actionId = parseInt(
+        (<string>menuWithAction.action).split(",")[1],
+        10
+      );
+    }
   }
 
   return { menuMap, roots };
 }
 
-// todo
+export function getAppAndAction(
+  info: MenuInfo,
+  query: { menu_id?: string; action_id?: string }
+): { app: MenuItem | null; actionId: number | null } {
+  let app = findApp(info, query.menu_id, query.action_id);
+  let actionId = findAction(info, query.menu_id, query.action_id);
 
-// menu -> formatURL(menuID, menus),
-// findApp(menuID, menus),
-// findMenu
+  return { app, actionId };
+}
+
+function findApp(
+  info: MenuInfo,
+  menu_id?: string,
+  action_id?: string
+): MenuItem | null {
+  if (menu_id) {
+    const menuID = parseInt(menu_id, 10);
+    if (info.roots.indexOf(menuID) > -1) {
+      const menu = info.menuMap[menuID];
+      if (menu) {
+        return menu;
+      }
+    }
+  }
+  if (action_id) {
+    for (let itemID in info.menuMap) {
+      let menu = info.menuMap[itemID];
+      const actionId = menu && menu.actionId;
+      if (actionId && String(actionId) === action_id) {
+        if (menu) {
+          let topMenu = info.menuMap[menu.menuId];
+          if (topMenu) {
+            return topMenu;
+          }
+        }
+      }
+    }
+  }
+  return null;
+}
+
+function findAction(
+  info: MenuInfo,
+  menu_id?: string,
+  action_id?: string
+): number | null {
+  if (action_id) {
+    return parseInt(action_id, 10);
+  }
+  if (menu_id) {
+    const menuID = parseInt(menu_id, 10);
+    const menu = info.menuMap[menuID]!;
+    return menu.actionId;
+  }
+  return null;
+}
diff --git a/web/static/src/ts/services/action_manager.ts b/web/static/src/ts/services/action_manager.ts
index 4d11da5f..5ec80570 100644
--- a/web/static/src/ts/services/action_manager.ts
+++ b/web/static/src/ts/services/action_manager.ts
@@ -1,8 +1,7 @@
 import { EventBus } from "../core/event_bus";
-import { Widget, Type } from "../core/widget";
-import { Env } from "../env";
 import { Registry } from "../core/registry";
-import { IRouter, Query } from "../core/router";
+import { Type, Widget } from "../core/widget";
+import { Env } from "../env";
 
 //------------------------------------------------------------------------------
 // Types
@@ -38,7 +37,6 @@ export type ActionEvent = "action_stack_updated";
 type Callback = (stack: ActionStack) => void;
 
 export interface IActionManager {
-  activate(): void;
   doAction(request: ActionRequest): void;
   on(event: ActionEvent, owner: any, callback: Callback): void;
   getStack(): ActionStack;
@@ -49,22 +47,15 @@ export interface IActionManager {
 //------------------------------------------------------------------------------
 
 export class ActionManager extends EventBus implements IActionManager {
-  router: IRouter;
   registry: Registry<Type<Widget<Env, any>>>;
   stack: ActionStack;
 
-  constructor(router: IRouter, registry: Registry<Type<Widget<Env, any>>>) {
+  constructor(registry: Registry<Type<Widget<Env, any>>>) {
     super();
-    this.router = router;
     this.registry = registry;
     this.stack = [];
   }
 
-  activate() {
-    this.router.on("query_changed", this, this.update);
-    this.update(this.router.getQuery());
-  }
-
   doAction(request: ActionRequest) {
     if (typeof request === "number") {
       // this is an action ID
@@ -89,11 +80,4 @@ export class ActionManager extends EventBus implements IActionManager {
   getStack(): ActionStack {
     return [];
   }
-
-  update(query: Query) {
-    if ("action_id" in query) {
-      const actionID = parseInt(query.action_id);
-      this.doAction(actionID);
-    }
-  }
 }
diff --git a/web/static/src/ts/widgets/Navbar.ts b/web/static/src/ts/widgets/Navbar.ts
index afa5ddb6..f8fb8c21 100644
--- a/web/static/src/ts/widgets/Navbar.ts
+++ b/web/static/src/ts/widgets/Navbar.ts
@@ -1,8 +1,10 @@
 import { Widget } from "../core/widget";
 import { Env, Menu } from "../env";
+import { MenuItem } from "../misc/menu_helpers";
 
 export interface Props {
   inHome: boolean;
+  app: MenuItem | null;
 }
 
 export class Navbar extends Widget<Env, Props> {
@@ -15,6 +17,6 @@ export class Navbar extends Widget<Env, Props> {
 
   toggleHome(ev: MouseEvent) {
     ev.preventDefault();
-    this.trigger("toggle-home-menu");
+    this.trigger("toggle_home_menu");
   }
 }
diff --git a/web/static/src/ts/widgets/home_menu.ts b/web/static/src/ts/widgets/home_menu.ts
index 04ac6d1a..aba94737 100644
--- a/web/static/src/ts/widgets/home_menu.ts
+++ b/web/static/src/ts/widgets/home_menu.ts
@@ -1,6 +1,6 @@
 import { Widget } from "../core/widget";
 import { Env } from "../env";
-import { MenuInfo, ProcessedMenuItem } from "../misc/menu_helpers";
+import { MenuInfo, MenuItem } from "../misc/menu_helpers";
 
 //------------------------------------------------------------------------------
 // Types
@@ -17,12 +17,13 @@ export interface Props {
 export class HomeMenu extends Widget<Env, Props> {
   template = "web.home_menu";
 
-  openApp(appId: number) {
-    debugger;
-  }
-
-  get apps(): ProcessedMenuItem[] {
+  get apps(): MenuItem[] {
     const info = this.props.menuInfo;
     return info.roots.map(root => info.menuMap[root]!);
   }
+
+  openApp(app: MenuItem, event: MouseEvent) {
+    event.preventDefault();
+    this.trigger("app_opened", app);
+  }
 }
diff --git a/web/static/src/ts/widgets/root.ts b/web/static/src/ts/widgets/root.ts
index e04e4fcb..02cc30ea 100644
--- a/web/static/src/ts/widgets/root.ts
+++ b/web/static/src/ts/widgets/root.ts
@@ -1,12 +1,13 @@
 import { INotification } from "../core/notifications";
 import { Widget } from "../core/widget";
 import { Env } from "../env";
-import { MenuInfo } from "../misc/menu_helpers";
+import { MenuInfo, MenuItem, getAppAndAction } from "../misc/menu_helpers";
 import { ActionStack } from "../services/action_manager";
 import { ActionContainer } from "./action_container";
 import { HomeMenu } from "./home_menu";
 import { Navbar } from "./navbar";
 import { Notification } from "./notification";
+import { Query } from "../core/router";
 
 //------------------------------------------------------------------------------
 // Types
@@ -16,6 +17,7 @@ interface State {
   notifications: INotification[];
   stack: ActionStack;
   inHome: boolean;
+  currentApp: MenuItem | null;
 }
 
 interface Props {
@@ -33,20 +35,61 @@ export class Root extends Widget<Env, Props> {
   state: State = {
     notifications: [],
     stack: [],
-    inHome: false
+    inHome: false,
+    currentApp: null
   };
 
+  constructor(env: Env, props: Props) {
+    super(env, props);
+    const query = this.env.router.getQuery();
+    let { app, actionId } = getAppAndAction(props.menuInfo, query);
+    this.state.currentApp = app;
+    if (!actionId) {
+      this.state.inHome = true;
+    }
+  }
   mounted() {
+    // notifications
     this.env.notifications.on("notifications_updated", this, notifs =>
       this.updateState({ notifications: notifs })
     );
+
+    // actions
     this.env.actionManager.on("action_stack_updated", this, stack =>
-      this.updateState({ stack })
+      this.updateState({ stack, inHome: false })
     );
-    this.env.actionManager.activate();
+    this.env.router.on("query_changed", this, this.updateAction);
+    this.updateAction(this.env.router.getQuery());
+  }
+
+  private updateAction(query: Query) {
+    let { app, actionId } = getAppAndAction(this.props.menuInfo, query);
+    this.updateAppState(app, actionId);
+  }
+
+  private updateAppState(app: MenuItem | null, actionId: number | null) {
+    const newApp = app || this.state.currentApp;
+    if (actionId) {
+      const query: Query = { action_id: String(actionId) };
+      const menuId = newApp ? newApp.menuId : false;
+      if (menuId) {
+        query.menu_id = String(menuId);
+      }
+      if (app) {
+        this.updateState({ currentApp: app });
+      }
+      this.env.router.navigate(query);
+      this.env.actionManager.doAction(actionId);
+    } else {
+      this.updateState({ inHome: true, currentApp: newApp });
+    }
   }
 
   toggleHome() {
     this.updateState({ inHome: !this.state.inHome });
   }
+
+  openApp(app: MenuItem) {
+    this.updateAppState(app, app.actionId);
+  }
 }
diff --git a/web/static/src/xml/templates.xml b/web/static/src/xml/templates.xml
index ecda302e..b11e223e 100644
--- a/web/static/src/xml/templates.xml
+++ b/web/static/src/xml/templates.xml
@@ -2,9 +2,9 @@
 <templates id="template" xml:space="preserve">
 
   <div t-name="web.web_client" class="o_web_client">
-    <t t-widget="Navbar" t-props="{inHome:state.inHome,app:state.currentApp}" t-on-toggle-home-menu="toggleHome"/>
+    <t t-widget="Navbar" t-props="{inHome:state.inHome,app:state.currentApp}" t-on-toggle_home_menu="toggleHome"/>
     <t t-if="state.inHome">
-      <t t-widget="HomeMenu" t-keep-alive="1" t-props="{menuInfo:props.menuInfo}"/>
+      <t t-widget="HomeMenu" t-keep-alive="1" t-props="{menuInfo:props.menuInfo}" t-on-app_opened="openApp"/>
     </t>
     <t t-else="1">
       <t t-widget="ActionContainer" t-props="{stack:state.stack}" t-keep-alive="1"/>
@@ -18,7 +18,10 @@
 
   <div t-name="web.navbar" class="o_navbar" t-att-class="props.inHome ? 'o_navbar o_in_home' : 'o_navbar'">
     <a aria-label="Applications" class="o_title fa fa-th" href="#" title="Applications" accesskey="h" t-on-click="toggleHome"/>
-    <ul t-if="!props.inHome">
+    <ul t-if="!props.inHome &amp;&amp; props.app">
+      <a class="o_menu_brand" href="#" role="button">
+        <t t-esc="props.app.name"/>
+      </a>
       <li t-foreach="env.menus" t-as="menu">
         <a t-att-href="getUrl(menu)">
           <t t-esc="menu.title"/>
@@ -30,7 +33,7 @@
 
   <div t-name="web.home_menu" class="o_home_menu">
     <div class="o_apps">
-      <a t-foreach="apps" t-as="app" href="#" class="o_app" t-on-click="openApp(app.id)">
+      <a t-foreach="apps" t-as="app" t-att-href="'#menu_id=' + app.menuId + '&amp;action_id=' + app.actionId" class="o_app" t-on-click="openApp(app)">
         <i t-att-class="app.icon + ' o_app_icon fa-3x fa-fw'"/>
         <div class="o_caption">
           <t t-esc="app.name"/>
diff --git a/web/static/tests/widgets/__snapshots__/home_menu.test.ts.snap b/web/static/tests/widgets/__snapshots__/home_menu.test.ts.snap
index 5d12b7e5..af61eea5 100644
--- a/web/static/tests/widgets/__snapshots__/home_menu.test.ts.snap
+++ b/web/static/tests/widgets/__snapshots__/home_menu.test.ts.snap
@@ -3,7 +3,7 @@
 exports[`can be rendered 1`] = `
 "<div class=\\"o_home_menu\\">
     <div class=\\"o_apps\\">
-      <a href=\\"#\\" class=\\"o_app\\">
+      <a href=\\"#menu_id=14&amp;action_id=43\\" class=\\"o_app\\">
         <i class=\\"fa fa-test o_app_icon fa-3x fa-fw\\"></i>
         <div class=\\"o_caption\\">
           Demo
diff --git a/web/static/tests/widgets/__snapshots__/navbar.test.ts.snap b/web/static/tests/widgets/__snapshots__/navbar.test.ts.snap
index f7e29083..d8647f3a 100644
--- a/web/static/tests/widgets/__snapshots__/navbar.test.ts.snap
+++ b/web/static/tests/widgets/__snapshots__/navbar.test.ts.snap
@@ -3,33 +3,20 @@
 exports[`can be rendered 1`] = `
 "<div class=\\"o_navbar\\">
     <a aria-label=\\"Applications\\" class=\\"o_title fa fa-th\\" href=\\"#\\" title=\\"Applications\\" accesskey=\\"h\\"></a>
-    <ul>
-      
-      
-    </ul>
+    
   </div>"
 `;
 
 exports[`can render one menu item 1`] = `
 "<div class=\\"o_navbar\\">
     <a aria-label=\\"Applications\\" class=\\"o_title fa fa-th\\" href=\\"#\\" title=\\"Applications\\" accesskey=\\"h\\"></a>
-    <ul>
-      <li>
-        <a href=\\"\\">
-          menu
-        </a>
-      </li>
-      
-    </ul>
+    
   </div>"
 `;
 
 exports[`mobile mode: navbar is different 1`] = `
 "<div class=\\"o_navbar\\">
     <a aria-label=\\"Applications\\" class=\\"o_title fa fa-th\\" href=\\"#\\" title=\\"Applications\\" accesskey=\\"h\\"></a>
-    <ul>
-      
-      <li>MOBILEMODE</li>
-    </ul>
+    
   </div>"
 `;
diff --git a/web/static/tests/widgets/home_menu.test.ts b/web/static/tests/widgets/home_menu.test.ts
index 2b8bb57a..595a0a7c 100644
--- a/web/static/tests/widgets/home_menu.test.ts
+++ b/web/static/tests/widgets/home_menu.test.ts
@@ -28,7 +28,9 @@ beforeEach(() => {
           parent_id: false,
           action: false,
           icon: "fa fa-test",
-          children: []
+          children: [],
+          menuId: 14,
+          actionId: 43
         }
       },
       roots: [14]
diff --git a/web/static/tests/widgets/navbar.test.ts b/web/static/tests/widgets/navbar.test.ts
index 89eaf801..d7c5f136 100644
--- a/web/static/tests/widgets/navbar.test.ts
+++ b/web/static/tests/widgets/navbar.test.ts
@@ -19,7 +19,7 @@ beforeEach(() => {
   fixture = makeTestFixture();
   env = makeTestEnv();
   env.qweb.loadTemplates(templates);
-  props = { inHome: false };
+  props = { inHome: false, app: null };
 });
 
 afterEach(() => {