--- a/mobile/android/base/java/org/mozilla/gecko/Experiments.java
+++ b/mobile/android/base/java/org/mozilla/gecko/Experiments.java
@@ -20,30 +20,22 @@ import java.util.List;
  * https://github.com/mozilla-services/switchboard-experiments
  */
 public class Experiments {
     private static final String LOGTAG = "GeckoExperiments";
 
     // Show a system notification linking to a "What's New" page on app update.
     public static final String WHATSNEW_NOTIFICATION = "whatsnew-notification";
 
-    // Onboarding: "Features and Story". These experiments are determined
-    // on the client, they are not part of the server config.
-    public static final String ONBOARDING3_A = "onboarding3-a"; // Control: No first run
-    public static final String ONBOARDING3_B = "onboarding3-b"; // 4 static Feature + 1 dynamic slides
-    public static final String ONBOARDING3_C = "onboarding3-c"; // Differentiating features slides
-
     // Synchronizing the catalog of downloadable content from Kinto
     public static final String DOWNLOAD_CONTENT_CATALOG_SYNC = "download-content-catalog-sync";
 
     // Promotion for "Add to homescreen"
     public static final String PROMOTE_ADD_TO_HOMESCREEN = "promote-add-to-homescreen";
 
-    public static final String PREF_ONBOARDING_VERSION = "onboarding_version";
-
     // Promotion to bookmark reader-view items after entering reader view three times (Bug 1247689)
     public static final String TRIPLE_READERVIEW_BOOKMARK_PROMPT = "triple-readerview-bookmark-prompt";
 
     // Only show origin in URL bar instead of full URL (Bug 1236431)
     public static final String URLBAR_SHOW_ORIGIN_ONLY = "urlbar-show-origin-only";
 
     // Show name of organization (EV cert) instead of full URL in URL bar (Bug 1249594).
     public static final String URLBAR_SHOW_EV_CERT_OWNER = "urlbar-show-ev-cert-owner";
@@ -65,23 +57,16 @@ public class Experiments {
 
     /**
      * Returns list of all active experiments, remote and local.
      * @return List of experiment names Strings
      */
     public static List<String> getActiveExperiments(Context c) {
         final List<String> experiments = new LinkedList<>();
         experiments.addAll(SwitchBoard.getActiveExperiments(c));
-
-        // Add onboarding version.
-        final String onboardingExperiment = GeckoSharedPrefs.forProfile(c).getString(Experiments.PREF_ONBOARDING_VERSION, null);
-        if (!TextUtils.isEmpty(onboardingExperiment)) {
-            experiments.add(onboardingExperiment);
-        }
-
         return experiments;
     }
 
     /**
      * Sets an override to force an experiment to be enabled or disabled. This value
      * will be read and used before reading the switchboard server configuration.
      *
      * @param c Context

--- a/mobile/android/base/java/org/mozilla/gecko/firstrun/FirstrunAnimationContainer.java
+++ b/mobile/android/base/java/org/mozilla/gecko/firstrun/FirstrunAnimationContainer.java
@@ -61,20 +61,16 @@ public class FirstrunAnimationContainer 
     }
 
     public void hide() {
         visible = false;
         if (onFinishListener != null) {
             onFinishListener.onFinish();
         }
         animateHide();
-
-        // Stop all versions of firstrun A/B sessions.
-        Telemetry.stopUISession(TelemetryContract.Session.EXPERIMENT, Experiments.ONBOARDING3_B);
-        Telemetry.stopUISession(TelemetryContract.Session.EXPERIMENT, Experiments.ONBOARDING3_C);
     }
 
     private void animateHide() {
         final Animator alphaAnimator = ObjectAnimator.ofFloat(this, "alpha", 0);
         alphaAnimator.setDuration(150);
         alphaAnimator.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {