Now you can link Firebase Crashlytics with UserExperior and understand exactly how your app crashed. UserExperior + Crashlytics integration will help you solve the crashes easily, reproduce crashes and reduce crash rates, save your development time with our session recordings.

This guide explains how to associate UserExperior Session URL with the Firebase Crashlytics which enables you to see a step by step session replay of the crashed session in UserExperior.

If you have not integrated UserExperior in your app, go to our SDK Integration Guide and integrate UserExperior first, then follow the below steps:


1. Switch On the Firebase Crashlytics in UserExperior Settings

Go to UserExperior Dashboard > Go to your app folder > Go to Settings > Select Integrations > Switch On Firebase Crashlytics

2. Add UserExperior Listener immediately after startRecording:


Add the following code in onCreate method of every launcher activity.

  UserExperior.startRecording(getApplicationContext(), "your-version-key-here");

  // UserExperior Listener: Third Party Integration
   UserExperior.setUserExperiorListener(new UserExperiorListener() {
  public void onUserExperiorStarted() {
      // Sending UserExperior Session URL to Firebase Crashlytics
      String ueSessionUrlFC = UserExperior.getSessionUrl("FirebaseCrashlytics");
      FirebaseCrashlytics.getInstance().setCustomKey("UE Session URL", ueSessionUrlFC);


  • Swift

        // Step 1: Add the UserExperiorDelegate protocol in your `AppDelegate.swift`
         class AppDelegate: UIResponder, UIApplicationDelegate, UserExperiorDelegate {
         func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         // Step 2: Setting delegate after UserExperior initialize
             return true
       // Step 3: Implement UserExperiorDelegate protocol
         func userExperiorSessionStarted() {
             let sessionURL = UserExperior.getSessionUrl("FIREBASE_CRASHLYTICS") // "FIREBASE_CRASHLYTICS" is used for firebase craslytics
             Crashlytics.crashlytics().setCustomValue(sessionURL, forKey: "UE Session URL")
  • Objective-C

        // Step 1: Add the UserExperiorDelegate protocol in your `AppDelegate.m`
         @interface AppDelegate () <UserExperiorDelegate>
         - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
             // Override point for customization after application launch.
             [UserExperior initialize:@"USER_KEY"];
         // Step 2: Setting delegate after UserExperior initialize
             [UserExperior setDelegate:self];
             return YES;
        // Step 3: Implement UserExperiorDelegate protocol
         - (void)userExperiorSessionStarted {
             NSString *sessionURL = [UserExperior getSessionUrl:@"FIREBASE_CRASHLYTICS"]; // "FIREBASE_CRASHLYTICS" is used for firebase craslytics
             [[FIRCrashlytics crashlytics] setCustomValue:sessionURL forKey:@"UE Session URL"];

Replay of Crashed Sessions

After completing the integration, every Crashlytics crash log will contain a key called "UE Session URL". You can just copy and paste the URL in your browser's window that will open the session in the UserExperior Dashboard. If the session was recorded you will be able to replay it in the UserExperior Dashboard.

Go to Firebase Console > Go to your app folder > Crashlytics > Click on the crash you want to debug > Click on the Keys > Copy the highlighted UE Session URL