diff --git a/web-app/src/app/App.tsx b/web-app/src/app/App.tsx
index 9ed54430d..7ec4f7fd8 100644
--- a/web-app/src/app/App.tsx
+++ b/web-app/src/app/App.tsx
@@ -8,13 +8,24 @@ import { RemoteConfigProvider } from './context/RemoteConfigProvider';
 import { useDispatch } from 'react-redux';
 import { anonymousLogin } from './store/profile-reducer';
 import i18n from '../i18n';
-import { Suspense, useEffect } from 'react';
+import { Suspense, useEffect, useState } from 'react';
 import { I18nextProvider } from 'react-i18next';
+import { app } from '../firebase';
 
 function App(): React.ReactElement {
   require('typeface-muli'); // Load font
   const dispatch = useDispatch();
+  const [isAppReady, setIsAppReady] = useState(false);
+
   useEffect(() => {
+    app.auth().onAuthStateChanged((user) => {
+      if (user != null) {
+        setIsAppReady(true);
+      } else {
+        setIsAppReady(false);
+        dispatch(anonymousLogin());
+      }
+    });
     dispatch(anonymousLogin());
   }, [dispatch]);
 
@@ -26,7 +37,7 @@ function App(): React.ReactElement {
             <AppSpinner>
               <BrowserRouter>
                 <Header />
-                <AppRouter />
+                {isAppReady ? <AppRouter /> : null}
               </BrowserRouter>
             </AppSpinner>
             <Footer />
diff --git a/web-app/src/app/components/LogoutConfirmModal.tsx b/web-app/src/app/components/LogoutConfirmModal.tsx
index e134e7b1d..26cc819a0 100644
--- a/web-app/src/app/components/LogoutConfirmModal.tsx
+++ b/web-app/src/app/components/LogoutConfirmModal.tsx
@@ -10,7 +10,7 @@ import {
 import React from 'react';
 import { useAppDispatch } from '../hooks';
 import { logout } from '../store/profile-reducer';
-import { SIGN_IN_TARGET } from '../constants/Navigation';
+import { SIGN_OUT_TARGET } from '../constants/Navigation';
 import { useNavigate } from 'react-router-dom';
 
 interface ConfirmModalProps {
@@ -25,7 +25,9 @@ export default function ConfirmModal({
   const dispatch = useAppDispatch();
   const navigateTo = useNavigate();
   const confirmLogout = (): void => {
-    dispatch(logout({ redirectScreen: SIGN_IN_TARGET, navigateTo }));
+    dispatch(
+      logout({ redirectScreen: SIGN_OUT_TARGET, navigateTo, propagate: true }),
+    );
     setOpenDialog(false);
   };
 
diff --git a/web-app/src/app/constants/Navigation.ts b/web-app/src/app/constants/Navigation.ts
index 9a218aa09..83a0adda9 100644
--- a/web-app/src/app/constants/Navigation.ts
+++ b/web-app/src/app/constants/Navigation.ts
@@ -1,7 +1,7 @@
 import type NavigationItem from '../interface/Navigation';
 import { type RemoteConfigValues } from '../interface/RemoteConfig';
 
-export const SIGN_OUT_TARGET = '/sign-out';
+export const SIGN_OUT_TARGET = '/';
 export const SIGN_IN_TARGET = '/sign-in';
 export const ACCOUNT_TARGET = '/account';
 export const POST_REGISTRATION_TARGET = '/verify-email';
diff --git a/web-app/src/app/router/Router.tsx b/web-app/src/app/router/Router.tsx
index 506863293..7beae4113 100644
--- a/web-app/src/app/router/Router.tsx
+++ b/web-app/src/app/router/Router.tsx
@@ -1,5 +1,5 @@
-import React from 'react';
-import { Routes, Route } from 'react-router-dom';
+import React, { useEffect } from 'react';
+import { Routes, Route, useNavigate } from 'react-router-dom';
 import SignIn from '../screens/SignIn';
 import SignUp from '../screens/SignUp';
 import Account from '../screens/Account';
@@ -17,8 +17,45 @@ import TermsAndConditions from '../screens/TermsAndConditions';
 import PrivacyPolicy from '../screens/PrivacyPolicy';
 import Feed from '../screens/Feed';
 import Feeds from '../screens/Feeds';
+import { SIGN_OUT_TARGET } from '../constants/Navigation';
+import {
+  LOGIN_CHANNEL,
+  LOGOUT_CHANNEL,
+  createBroadcastChannel,
+} from '../services/channel-service';
+import { useAppDispatch } from '../hooks';
+import { logout } from '../store/profile-reducer';
 
 export const AppRouter: React.FC = () => {
+  const navigateTo = useNavigate();
+  const dispatch = useAppDispatch();
+
+  /**
+   * Logs out the user and redirects to the sign-out target screen after a logout event is received on the other sessions.
+   */
+  const logoutUserCallback = (): void => {
+    dispatch(
+      logout({ redirectScreen: SIGN_OUT_TARGET, navigateTo, propagate: false }),
+    );
+  };
+
+  /**
+   * Refreshes the page to ensure the user is authenticated after a login event is received on the other sessions.
+   */
+  const loginUserCallback = (): void => {
+    window.location.reload();
+  };
+
+  /**
+   * The channel creation is placed in this component rather than the App.tsx file due to the need of the navigateTo instance.
+   * The navigateTo instance is only available within the scope the Router including its children.
+   * The callback functions are used to handle the logout and login events received from other sessions.
+   */
+  useEffect(() => {
+    createBroadcastChannel(LOGOUT_CHANNEL, logoutUserCallback);
+    createBroadcastChannel(LOGIN_CHANNEL, loginUserCallback);
+  }, []);
+
   return (
     <Routes>
       <Route path='/' element={<Home />} />
diff --git a/web-app/src/app/services/channel-service.ts b/web-app/src/app/services/channel-service.ts
new file mode 100644
index 000000000..ff1f35b65
--- /dev/null
+++ b/web-app/src/app/services/channel-service.ts
@@ -0,0 +1,52 @@
+let channels: Map<string, BroadcastChannel> | undefined;
+
+export const LOGOUT_CHANNEL = 'logout-channel';
+export const LOGIN_CHANNEL = 'login-channel';
+
+/**
+ * Creates a new broadcast channel with the specified name and callback. The callback is called when a message is received.
+ * If the channel already exists, the function returns false.
+ * @param channelName name of the channel
+ * @param callback function to be called when a message is received
+ * @returns true if the channel was created, false if the channel already exists
+ * @see broadcastMessage
+ */
+export const createBroadcastChannel = (
+  channelName: string,
+  callback: () => void,
+): boolean => {
+  if (channels === undefined) {
+    channels = new Map<string, BroadcastChannel>();
+  }
+  let channel = channels.get(channelName);
+  if (channel !== undefined) {
+    return false;
+  }
+  channel = new BroadcastChannel(channelName);
+  channel.onmessage = () => {
+    callback();
+  };
+  channels.set(channelName, channel);
+  return true;
+};
+
+/**
+ * Broadcasts a message to all subscribers of the channel. The channel must be created before broadcasting.
+ * If the channel is not found, an error is thrown.
+ * @param channelName name of the channel
+ * @param message to be broadcasted or undefined
+ * @see createDispatchChannel
+ */
+export const broadcastMessage = (
+  channelName: string,
+  message?: string,
+): void => {
+  if (channels === undefined) {
+    throw new Error('No channels created');
+  }
+  const channel = channels.get(channelName);
+  if (channel === undefined) {
+    throw new Error(`Channel ${channelName} not found`);
+  }
+  channel.postMessage(message);
+};
diff --git a/web-app/src/app/store/profile-reducer.ts b/web-app/src/app/store/profile-reducer.ts
index 994300fde..34eec6121 100644
--- a/web-app/src/app/store/profile-reducer.ts
+++ b/web-app/src/app/store/profile-reducer.ts
@@ -43,6 +43,7 @@ const initialState: UserProfileState = {
     Registration: null,
     ResetPassword: null,
     VerifyEmail: null,
+    AnonymousLogin: null,
   },
   isRefreshingAccessToken: false,
   isVerificationEmailSent: false,
@@ -83,6 +84,7 @@ export const userProfileSlice = createSlice({
       action: PayloadAction<{
         redirectScreen: string;
         navigateTo: NavigateFunction;
+        propagate: boolean;
       }>,
     ) => {
       state.status = 'login_out';
@@ -93,6 +95,7 @@ export const userProfileSlice = createSlice({
       state.status = 'unauthenticated';
       state.isSignedInWithProvider = false;
       state.isAppRefreshing = false;
+      state.user = undefined;
     },
     logoutFail: (state) => {
       state.status = 'unauthenticated';
@@ -253,9 +256,15 @@ export const userProfileSlice = createSlice({
     },
     anonymousLogin: (state) => {
       state.isAppRefreshing = true;
+      state.errors.AnonymousLogin = null;
     },
-    anonymousLoginFailed: (state) => {
+    anonymousLoginFailed: (state, action: PayloadAction<ProfileError>) => {
       state.isAppRefreshing = false;
+      state.errors.AnonymousLogin = action.payload;
+    },
+    anonymousLoginSkipped: (state, action: PayloadAction<ProfileError>) => {
+      state.isAppRefreshing = false;
+      state.errors.AnonymousLogin = action.payload;
     },
   },
 });
@@ -293,6 +302,7 @@ export const {
   emailVerified,
   anonymousLogin,
   anonymousLoginFailed,
+  anonymousLoginSkipped,
 } = userProfileSlice.actions;
 
 export default userProfileSlice.reducer;
diff --git a/web-app/src/app/store/saga/auth-saga.ts b/web-app/src/app/store/saga/auth-saga.ts
index cc133b2b7..481f1a214 100644
--- a/web-app/src/app/store/saga/auth-saga.ts
+++ b/web-app/src/app/store/saga/auth-saga.ts
@@ -14,6 +14,7 @@ import {
   USER_PROFILE_SEND_VERIFICATION_EMAIL,
   USER_PROFILE_ANONYMOUS_LOGIN,
   type ProfileError,
+  ProfileErrorSource,
 } from '../../types';
 import 'firebase/compat/auth';
 import {
@@ -28,8 +29,8 @@ import {
   resetPasswordSuccess,
   verifyFail,
   verifySuccess,
-  anonymousLogin,
   anonymousLoginFailed,
+  anonymousLoginSkipped,
 } from '../profile-reducer';
 import { type NavigateFunction } from 'react-router-dom';
 import {
@@ -49,7 +50,12 @@ import {
   signInAnonymously,
 } from 'firebase/auth';
 import { getAppError } from '../../utils/error';
-import { selectIsAuthenticated } from '../profile-selectors';
+import { selectIsAnonymous, selectIsAuthenticated } from '../profile-selectors';
+import {
+  LOGIN_CHANNEL,
+  LOGOUT_CHANNEL,
+  broadcastMessage,
+} from '../../services/channel-service';
 
 function* emailLoginSaga({
   payload: { email, password },
@@ -68,22 +74,26 @@ function* emailLoginSaga({
       undefined,
     );
     yield put(loginSuccess(userEnhanced));
+    broadcastMessage(LOGIN_CHANNEL);
   } catch (error) {
     yield put(loginFail(getAppError(error) as ProfileError));
   }
 }
 
 function* logoutSaga({
-  payload: { redirectScreen, navigateTo },
+  payload: { redirectScreen, navigateTo, propagate },
 }: PayloadAction<{
   redirectScreen: string;
   navigateTo: NavigateFunction;
+  propagate: boolean;
 }>): Generator {
   try {
+    navigateTo(redirectScreen);
     yield app.auth().signOut();
     yield put(logoutSuccess());
-    yield put(anonymousLogin()); // Use anonymous login to keep the user signed in
-    navigateTo(redirectScreen);
+    if (propagate) {
+      broadcastMessage(LOGOUT_CHANNEL);
+    }
   } catch (error) {
     yield put(loginFail(getAppError(error) as ProfileError));
   }
@@ -159,6 +169,7 @@ function* loginWithProviderSaga({
       additionalUserInfo,
     );
     yield put(loginSuccess(userEnhanced));
+    broadcastMessage(LOGIN_CHANNEL);
   } catch (error) {
     yield put(loginFail(getAppError(error) as ProfileError));
   }
@@ -185,7 +196,13 @@ function* anonymousLoginSaga(): Generator {
       selectIsAuthenticated,
     )) as boolean;
     if (isAuthenticated) {
-      yield put(anonymousLoginFailed()); // fails silently
+      yield put(
+        anonymousLoginSkipped({
+          code: 'unknown',
+          message: 'User is already authenticated',
+          source: ProfileErrorSource.AnonymousLogin,
+        }),
+      );
       return;
     }
 
@@ -194,13 +211,39 @@ function* anonymousLoginSaga(): Generator {
     yield call(async () => {
       await signInAnonymously(auth);
     });
+
+    const hasStateAnonymousSet: boolean = (yield select(
+      selectIsAnonymous,
+    )) as boolean;
+    if (hasStateAnonymousSet) {
+      yield put(
+        anonymousLoginSkipped({
+          code: 'unknown',
+          message: 'User had already login as anonymous before.',
+          source: ProfileErrorSource.AnonymousLogin,
+        }),
+      );
+      return;
+    }
     const user = yield call(getUserFromSession);
     if (user === null) {
-      throw new Error('User not found');
+      anonymousLoginSkipped({
+        code: 'unknown',
+        message: 'User not found',
+        source: ProfileErrorSource.AnonymousLogin,
+      });
+      return;
     }
     const firebaseUser = app.auth().currentUser;
     if (firebaseUser === null) {
-      throw new Error('Firebase user not found');
+      yield put(
+        anonymousLoginFailed({
+          code: 'unknown',
+          message: 'User not found',
+          source: ProfileErrorSource.AnonymousLogin,
+        }),
+      );
+      return;
     }
     const currentUser = {
       ...user,
@@ -208,7 +251,13 @@ function* anonymousLoginSaga(): Generator {
     };
     yield put(loginSuccess(currentUser as User));
   } catch (error) {
-    yield put(anonymousLoginFailed()); // fails silently
+    yield put(
+      anonymousLoginFailed({
+        code: 'unknown',
+        message: 'Critical error while login as anonymous.',
+        source: ProfileErrorSource.AnonymousLogin,
+      }),
+    );
   }
 }
 
diff --git a/web-app/src/app/store/store.ts b/web-app/src/app/store/store.ts
index 818884b23..ee575ca41 100644
--- a/web-app/src/app/store/store.ts
+++ b/web-app/src/app/store/store.ts
@@ -7,7 +7,7 @@ import {
   PURGE,
   REGISTER,
 } from 'redux-persist';
-import storage from 'redux-persist/lib/storage/session';
+import storage from 'redux-persist/lib/storage';
 import {
   configureStore,
   type ThunkAction,
diff --git a/web-app/src/app/types.ts b/web-app/src/app/types.ts
index 81344ea8e..9ad9b3eb4 100644
--- a/web-app/src/app/types.ts
+++ b/web-app/src/app/types.ts
@@ -81,6 +81,7 @@ export enum ProfileErrorSource {
   Registration = 'Registration',
   ResetPassword = 'ResetPassword',
   VerifyEmail = 'VerifyEmail',
+  AnonymousLogin = 'AnonymousLogin',
 }
 export enum FeedErrorSource {
   DatabaseAPI = 'DatabaseAPI',