diff --git a/auth-next/custom-email-handler.js b/auth-next/custom-email-handler.js
index 728baff8..5fcc1f71 100644
--- a/auth-next/custom-email-handler.js
+++ b/auth-next/custom-email-handler.js
@@ -28,8 +28,8 @@ function handleUserManagementQueryParams() {
     // Configure the Firebase SDK.
     // This is the minimum configuration required for the API to be used.
     const config = {
-      'apiKey': "YOU_API_KEY" // Copy this key from the web initialization
-                              // snippet found in the Firebase console.
+      'apiKey': "YOUR_API_KEY" // Copy this key from the web initialization
+                               // snippet found in the Firebase console.
     };
     const app = initializeApp(config);
     const auth = getAuth(app);
diff --git a/auth-next/email-link-auth.js b/auth-next/email-link-auth.js
index 59ea2115..fde67663 100644
--- a/auth-next/email-link-auth.js
+++ b/auth-next/email-link-auth.js
@@ -19,7 +19,8 @@ function emailLinkActionCodeSettings() {
       installApp: true,
       minimumVersion: '12'
     },
-    dynamicLinkDomain: 'example.page.link'
+    // The domain must be configured in Firebase Hosting and owned by the project.
+    linkDomain: 'custom-domain.com'
   };
   // [END auth_email_link_actioncode_settings]
 }
@@ -68,11 +69,13 @@ function emailLinkComplete() {
       .then((result) => {
         // Clear email from storage.
         window.localStorage.removeItem('emailForSignIn');
-        // You can access the new user via result.user
-        // Additional user info profile not available via:
-        // result.additionalUserInfo.profile == null
+        // You can access the new user by importing getAdditionalUserInfo
+        // and calling it with result:
+        // getAdditionalUserInfo(result)
+        // You can access the user's profile via:
+        // getAdditionalUserInfo(result)?.profile
         // You can check if the user is new or existing:
-        // result.additionalUserInfo.isNewUser
+        // getAdditionalUserInfo(result)?.isNewUser
       })
       .catch((error) => {
         // Some error occurred, you can inspect the code: error.code
diff --git a/auth-next/email.js b/auth-next/email.js
index b00551c8..26391f81 100644
--- a/auth-next/email.js
+++ b/auth-next/email.js
@@ -32,7 +32,7 @@ function signUpWithEmailPassword() {
   const auth = getAuth();
   createUserWithEmailAndPassword(auth, email, password)
     .then((userCredential) => {
-      // Signed in 
+      // Signed up 
       const user = userCredential.user;
       // ...
     })
diff --git a/auth-next/link-multiple-accounts.js b/auth-next/link-multiple-accounts.js
index 34c0db58..1938aafc 100644
--- a/auth-next/link-multiple-accounts.js
+++ b/auth-next/link-multiple-accounts.js
@@ -182,3 +182,61 @@ function unlink(providerId) {
   });
   // [END auth_unlink_provider]
 }
+
+function accountExistsPopup(auth, facebookProvider, goToApp, promptUserForPassword, promptUserForSignInMethod, getProviderForProviderId) {
+  // [START account_exists_popup]
+  const { signInWithPopup, signInWithEmailAndPassword, linkWithCredential } = require("firebase/auth");
+
+  // User tries to sign in with Facebook.
+  signInWithPopup(auth, facebookProvider).catch((error) => {
+  // User's email already exists.
+  if (error.code === 'auth/account-exists-with-different-credential') {
+    // The pending Facebook credential.
+    const pendingCred = error.credential;
+    // The provider account's email address.
+    const email = error.customData.email;
+    
+    // Present the user with a list of providers they might have
+    // used to create the original account.
+    // Then, ask the user to sign in with the existing provider.
+    const method = promptUserForSignInMethod();
+      
+    if (method === 'password') {
+      // TODO: Ask the user for their password.
+      // In real scenario, you should handle this asynchronously.
+      const password = promptUserForPassword();
+      signInWithEmailAndPassword(auth, email, password).then((result) => {
+        return linkWithCredential(result.user, pendingCred);
+      }).then(() => {
+        // Facebook account successfully linked to the existing user.
+        goToApp();
+      });
+      return;
+    }
+      
+    // All other cases are external providers.
+    // Construct provider object for that provider.
+    // TODO: Implement getProviderForProviderId.
+    const provider = getProviderForProviderId(method);
+    // At this point, you should let the user know that they already have an
+    // account with a different provider, and validate they want to sign in
+    // with the new provider.
+    // Note: Browsers usually block popups triggered asynchronously, so in
+    // real app, you should ask the user to click on a "Continue" button
+    // that will trigger signInWithPopup().
+    signInWithPopup(auth, provider).then((result) => {
+      // Note: Identity Platform doesn't control the provider's sign-in
+      // flow, so it's possible for the user to sign in with an account
+      // with a different email from the first one.
+
+      // Link the Facebook credential. We have access to the pending
+      // credential, so we can directly call the link method.
+      linkWithCredential(result.user, pendingCred).then((userCred) => {
+        // Success.
+        goToApp();
+      });
+    });
+  }
+});
+// [END account_exists_popup]
+}
diff --git a/auth/link-multiple-accounts.js b/auth/link-multiple-accounts.js
index 30f5a2ec..8eed77b8 100644
--- a/auth/link-multiple-accounts.js
+++ b/auth/link-multiple-accounts.js
@@ -166,3 +166,59 @@ function unlink(providerId) {
   });
   // [END auth_unlink_provider]
 }
+
+function accountExistsPopup(facebookProvider, goToApp, promptUserForPassword, promptUserForSignInMethod, getProviderForProviderId) {
+  // [START account_exists_popup]
+  // User tries to sign in with Facebook.
+      auth.signInWithPopup(facebookProvider).catch((error) => {
+  // User's email already exists.
+  if (error.code === 'auth/account-exists-with-different-credential') {
+    // The pending Facebook credential.
+    const pendingCred = error.credential;
+    // The provider account's email address.
+    const email = error.email;
+    
+    // Present the user with a list of providers they might have
+    // used to create the original account.
+    // Then, ask the user to sign in with the existing provider.
+    const method = promptUserForSignInMethod();
+      
+    if (method === 'password') {
+      // TODO: Ask the user for their password.
+      // In real scenario, you should handle this asynchronously.
+      const password = promptUserForPassword();
+      auth.signInWithEmailAndPassword(email, password).then((result) => {
+        return result.user.linkWithCredential(pendingCred);
+      }).then(() => {
+        // Facebook account successfully linked to the existing user.
+        goToApp();
+      });
+      return;
+    }
+      
+    // All other cases are external providers.
+    // Construct provider object for that provider.
+    // TODO: Implement getProviderForProviderId.
+    const provider = getProviderForProviderId(method);
+    // At this point, you should let the user know that they already have an
+    // account with a different provider, and validate they want to sign in
+    // with the new provider.
+    // Note: Browsers usually block popups triggered asynchronously, so in
+    // real app, you should ask the user to click on a "Continue" button
+    // that will trigger signInWithPopup().
+    auth.signInWithPopup(provider).then((result) => {
+      // Note: Identity Platform doesn't control the provider's sign-in
+      // flow, so it's possible for the user to sign in with an account
+      // with a different email from the first one.
+
+      // Link the Facebook credential. We have access to the pending
+      // credential, so we can directly call the link method.
+      result.user.linkWithCredential(pendingCred).then((userCred) => {
+        // Success.
+        goToApp();
+      });
+    });
+  }
+});
+// [END account_exists_popup]
+}
diff --git a/auth/package.json b/auth/package.json
index a6827027..b4b13f01 100644
--- a/auth/package.json
+++ b/auth/package.json
@@ -7,6 +7,7 @@
   "license": "Apache 2.0",
   "dependencies": {
     "firebase": "^8.10.0",
+    "firebase-admin": "^12.0.0",
     "firebaseui": "^5.0.0"
   }
 }
diff --git a/auth/service-worker-sessions.js b/auth/service-worker-sessions.js
index babbf91e..05791463 100644
--- a/auth/service-worker-sessions.js
+++ b/auth/service-worker-sessions.js
@@ -162,3 +162,46 @@ function svcSignInEmail(email, password) {
     });
   // [END auth_svc_sign_in_email]
 }
+
+function svcRedirectAdmin() {
+  const app = { use: (a) => {} };
+
+  // [START auth_svc_admin]
+  // Server side code.
+  const admin = require('firebase-admin');
+
+  // The Firebase Admin SDK is used here to verify the ID token.
+  admin.initializeApp();
+
+  function getIdToken(req) {
+    // Parse the injected ID token from the request header.
+    const authorizationHeader = req.headers.authorization || '';
+    const components = authorizationHeader.split(' ');
+    return components.length > 1 ? components[1] : '';
+  }
+
+  function checkIfSignedIn(url) {
+    return (req, res, next) => {
+      if (req.url == url) {
+        const idToken = getIdToken(req);
+        // Verify the ID token using the Firebase Admin SDK.
+        // User already logged in. Redirect to profile page.
+        admin.auth().verifyIdToken(idToken).then((decodedClaims) => {
+          // User is authenticated, user claims can be retrieved from
+          // decodedClaims.
+          // In this sample code, authenticated users are always redirected to
+          // the profile page.
+          res.redirect('/profile');
+        }).catch((error) => {
+          next();
+        });
+      } else {
+        next();
+      }
+    };
+  }
+
+  // If a user is signed in, redirect to profile page.
+  app.use(checkIfSignedIn('/'));
+  // [END auth_svc_admin]
+}
diff --git a/firebaseserverapp-next/firebaseserverapp.js b/firebaseserverapp-next/firebaseserverapp.js
new file mode 100644
index 00000000..d0ab338c
--- /dev/null
+++ b/firebaseserverapp-next/firebaseserverapp.js
@@ -0,0 +1,27 @@
+// @ts-nocheck
+// [START serverapp_auth]
+import { initializeServerApp } from 'firebase/app';
+import { getAuth } from 'firebase/auth';
+import { headers } from 'next/headers';
+import { redirect } from 'next/navigation';
+
+export default function MyServerComponent() {
+
+    // Get relevant request headers (in Next.JS)
+    const authIdToken = headers().get('Authorization')?.split('Bearer ')[1];
+
+    // Initialize the FirebaseServerApp instance.
+    const serverApp = initializeServerApp(firebaseConfig, { authIdToken });
+
+    // Initialize Firebase Authentication using the FirebaseServerApp instance.
+    const auth = getAuth(serverApp);
+
+    if (auth.currentUser) {
+        redirect('/profile');
+    }
+
+    // ...
+}
+// [END serverapp_auth]
+
+const firebaseConfig = {};
diff --git a/firebaseserverapp-next/package.json b/firebaseserverapp-next/package.json
new file mode 100644
index 00000000..0836b0b2
--- /dev/null
+++ b/firebaseserverapp-next/package.json
@@ -0,0 +1,12 @@
+{
+  "name": "firebaseserverapp-next",
+  "version": "1.0.0",
+  "scripts": {
+    "compile": "cp ../tsconfig.json.template ./tsconfig.json && tsc"
+  },
+  "license": "Apache-2.0",
+  "dependencies": {
+    "firebase": "^10.0.0",
+    "next": "^14.1.3"
+  }
+}
diff --git a/firestore-next/test.firestore.js b/firestore-next/test.firestore.js
index c961af9d..969c1654 100644
--- a/firestore-next/test.firestore.js
+++ b/firestore-next/test.firestore.js
@@ -920,7 +920,7 @@ describe("firestore", () => {
                 // [START in_filter_with_array]
                 const { query, where } = require("firebase/firestore");  
 
-                const q = query(citiesRef, where('regions', 'in', [['west_coast', 'east_coast']]));
+                const q = query(citiesRef, where('regions', 'in', [['west_coast'], ['east_coast']]));
                 // [END in_filter_with_array]
               }
             });
diff --git a/firestore/test.firestore.js b/firestore/test.firestore.js
index ec89172e..20032d36 100644
--- a/firestore/test.firestore.js
+++ b/firestore/test.firestore.js
@@ -893,7 +893,7 @@ describe("firestore", () => {
 
                 // [START in_filter_with_array]
                 citiesRef.where('regions', 'in',
-                    [['west_coast', 'east_coast']]);
+                    [['west_coast'], ['east_coast']]);
                 // [END in_filter_with_array]
             });
 
diff --git a/messaging/service-worker.js b/messaging/service-worker.js
index c0f875bb..1a202159 100644
--- a/messaging/service-worker.js
+++ b/messaging/service-worker.js
@@ -10,8 +10,9 @@ function initInSw() {
   // Give the service worker access to Firebase Messaging.
   // Note that you can only use Firebase Messaging here. Other Firebase libraries
   // are not available in the service worker.
-  importScripts('https://www.gstatic.com/firebasejs/8.10.1/firebase-app.js');
-  importScripts('https://www.gstatic.com/firebasejs/8.10.1/firebase-messaging.js');
+  // Replace 10.13.2 with latest version of the Firebase JS SDK.
+  importScripts('https://www.gstatic.com/firebasejs/10.13.2/firebase-app-compat.js');
+  importScripts('https://www.gstatic.com/firebasejs/10.13.2/firebase-messaging-compat.js');
 
   // Initialize the Firebase app in the service worker by passing in
   // your app's Firebase config object.
diff --git a/remoteconfig-next/index.js b/remoteconfig-next/index.js
index aeeb263a..287f3c99 100644
--- a/remoteconfig-next/index.js
+++ b/remoteconfig-next/index.js
@@ -14,6 +14,7 @@ function getInstance() {
 function setMinimumFetchTime() {
   const remoteConfig = getInstance();
   // [START rc_set_minimum_fetch_time]
+  // The default and recommended production fetch interval for Remote Config is 12 hours
   remoteConfig.settings.minimumFetchIntervalMillis = 3600000;
   // [END rc_set_minimum_fetch_time]
 }
diff --git a/snippets/auth-next/custom-email-handler/auth_handle_mgmt_query_params.js b/snippets/auth-next/custom-email-handler/auth_handle_mgmt_query_params.js
index 6dec3399..d0a22696 100644
--- a/snippets/auth-next/custom-email-handler/auth_handle_mgmt_query_params.js
+++ b/snippets/auth-next/custom-email-handler/auth_handle_mgmt_query_params.js
@@ -23,8 +23,8 @@ document.addEventListener('DOMContentLoaded', () => {
   // Configure the Firebase SDK.
   // This is the minimum configuration required for the API to be used.
   const config = {
-    'apiKey': "YOU_API_KEY" // Copy this key from the web initialization
-                            // snippet found in the Firebase console.
+    'apiKey': "YOUR_API_KEY" // Copy this key from the web initialization
+                             // snippet found in the Firebase console.
   };
   const app = initializeApp(config);
   const auth = getAuth(app);
diff --git a/snippets/auth-next/email-link-auth/auth_email_link_actioncode_settings.js b/snippets/auth-next/email-link-auth/auth_email_link_actioncode_settings.js
index a1480a11..010b5c09 100644
--- a/snippets/auth-next/email-link-auth/auth_email_link_actioncode_settings.js
+++ b/snippets/auth-next/email-link-auth/auth_email_link_actioncode_settings.js
@@ -19,6 +19,7 @@ const actionCodeSettings = {
     installApp: true,
     minimumVersion: '12'
   },
-  dynamicLinkDomain: 'example.page.link'
+  // The domain must be configured in Firebase Hosting and owned by the project.
+  linkDomain: 'custom-domain.com'
 };
 // [END auth_email_link_actioncode_settings_modular]
\ No newline at end of file
diff --git a/snippets/auth-next/email-link-auth/email_link_complete.js b/snippets/auth-next/email-link-auth/email_link_complete.js
index b42b9af9..dbe1143d 100644
--- a/snippets/auth-next/email-link-auth/email_link_complete.js
+++ b/snippets/auth-next/email-link-auth/email_link_complete.js
@@ -26,11 +26,13 @@ if (isSignInWithEmailLink(auth, window.location.href)) {
     .then((result) => {
       // Clear email from storage.
       window.localStorage.removeItem('emailForSignIn');
-      // You can access the new user via result.user
-      // Additional user info profile not available via:
-      // result.additionalUserInfo.profile == null
+      // You can access the new user by importing getAdditionalUserInfo
+      // and calling it with result:
+      // getAdditionalUserInfo(result)
+      // You can access the user's profile via:
+      // getAdditionalUserInfo(result)?.profile
       // You can check if the user is new or existing:
-      // result.additionalUserInfo.isNewUser
+      // getAdditionalUserInfo(result)?.isNewUser
     })
     .catch((error) => {
       // Some error occurred, you can inspect the code: error.code
diff --git a/snippets/auth-next/email/auth_signup_password.js b/snippets/auth-next/email/auth_signup_password.js
index 00aa9bd5..936b64ce 100644
--- a/snippets/auth-next/email/auth_signup_password.js
+++ b/snippets/auth-next/email/auth_signup_password.js
@@ -10,7 +10,7 @@ import { getAuth, createUserWithEmailAndPassword } from "firebase/auth";
 const auth = getAuth();
 createUserWithEmailAndPassword(auth, email, password)
   .then((userCredential) => {
-    // Signed in 
+    // Signed up 
     const user = userCredential.user;
     // ...
   })
diff --git a/snippets/auth-next/link-multiple-accounts/account_exists_popup.js b/snippets/auth-next/link-multiple-accounts/account_exists_popup.js
new file mode 100644
index 00000000..2c667882
--- /dev/null
+++ b/snippets/auth-next/link-multiple-accounts/account_exists_popup.js
@@ -0,0 +1,61 @@
+// This snippet file was generated by processing the source file:
+// ./auth-next/link-multiple-accounts.js
+//
+// To update the snippets in this file, edit the source and then run
+// 'npm run snippets'.
+
+  // [START account_exists_popup_modular]
+  import { signInWithPopup, signInWithEmailAndPassword, linkWithCredential } from "firebase/auth";
+
+  // User tries to sign in with Facebook.
+  signInWithPopup(auth, facebookProvider).catch((error) => {
+  // User's email already exists.
+  if (error.code === 'auth/account-exists-with-different-credential') {
+    // The pending Facebook credential.
+    const pendingCred = error.credential;
+    // The provider account's email address.
+    const email = error.customData.email;
+
+    // Present the user with a list of providers they might have
+    // used to create the original account.
+    // Then, ask the user to sign in with the existing provider.
+    const method = promptUserForSignInMethod();
+
+    if (method === 'password') {
+      // TODO: Ask the user for their password.
+      // In real scenario, you should handle this asynchronously.
+      const password = promptUserForPassword();
+      signInWithEmailAndPassword(auth, email, password).then((result) => {
+        return linkWithCredential(result.user, pendingCred);
+      }).then(() => {
+        // Facebook account successfully linked to the existing user.
+        goToApp();
+      });
+      return;
+    }
+
+    // All other cases are external providers.
+    // Construct provider object for that provider.
+    // TODO: Implement getProviderForProviderId.
+    const provider = getProviderForProviderId(method);
+    // At this point, you should let the user know that they already have an
+    // account with a different provider, and validate they want to sign in
+    // with the new provider.
+    // Note: Browsers usually block popups triggered asynchronously, so in
+    // real app, you should ask the user to click on a "Continue" button
+    // that will trigger signInWithPopup().
+    signInWithPopup(auth, provider).then((result) => {
+      // Note: Identity Platform doesn't control the provider's sign-in
+      // flow, so it's possible for the user to sign in with an account
+      // with a different email from the first one.
+
+      // Link the Facebook credential. We have access to the pending
+      // credential, so we can directly call the link method.
+      linkWithCredential(result.user, pendingCred).then((userCred) => {
+        // Success.
+        goToApp();
+      });
+    });
+  }
+});
+// [END account_exists_popup_modular]
\ No newline at end of file
diff --git a/snippets/firestore-next/test-firestore/in_filter_with_array.js b/snippets/firestore-next/test-firestore/in_filter_with_array.js
index ebe6f18b..190e9dfe 100644
--- a/snippets/firestore-next/test-firestore/in_filter_with_array.js
+++ b/snippets/firestore-next/test-firestore/in_filter_with_array.js
@@ -7,5 +7,5 @@
 // [START in_filter_with_array_modular]
 import { query, where } from "firebase/firestore";  
 
-const q = query(citiesRef, where('regions', 'in', [['west_coast', 'east_coast']]));
+const q = query(citiesRef, where('regions', 'in', [['west_coast'], ['east_coast']]));
 // [END in_filter_with_array_modular]
\ No newline at end of file
diff --git a/snippets/remoteconfig-next/index/rc_set_minimum_fetch_time.js b/snippets/remoteconfig-next/index/rc_set_minimum_fetch_time.js
index 131976c5..77aa9f45 100644
--- a/snippets/remoteconfig-next/index/rc_set_minimum_fetch_time.js
+++ b/snippets/remoteconfig-next/index/rc_set_minimum_fetch_time.js
@@ -5,5 +5,6 @@
 // 'npm run snippets'.
 
 // [START rc_set_minimum_fetch_time_modular]
+// The default and recommended production fetch interval for Remote Config is 12 hours
 remoteConfig.settings.minimumFetchIntervalMillis = 3600000;
 // [END rc_set_minimum_fetch_time_modular]
\ No newline at end of file