diff --git a/mobile/android/base/AppConstants.java.in b/mobile/android/base/AppConstants.java.in
index cb3e37867c93..57c2aee5512e 100644
--- a/mobile/android/base/AppConstants.java.in
+++ b/mobile/android/base/AppConstants.java.in
@@ -318,11 +318,4 @@ public class AppConstants {
 
     // (bug 1266820) Temporarily disabled since no one is working on it.
     public static final boolean SCREENSHOTS_IN_BOOKMARKS_ENABLED = false;
-
-    public static final boolean MOZ_ANDROID_ACTIVITY_STREAM =
-//#ifdef MOZ_ANDROID_ACTIVITY_STREAM
-        true;
-//#else
-        false;
-//#endif
 }
diff --git a/mobile/android/base/generate_build_config.py b/mobile/android/base/generate_build_config.py
index 708b61fc245b..82c3e5c5ed1b 100644
--- a/mobile/android/base/generate_build_config.py
+++ b/mobile/android/base/generate_build_config.py
@@ -37,8 +37,7 @@ def main(output_file, input_filename):
     CONFIG.update(buildconfig.substs)
     DEFINES = {}
 
-    for var in ('MOZ_ANDROID_ACTIVITY_STREAM'
-                'MOZ_ANDROID_ANR_REPORTER',
+    for var in ('MOZ_ANDROID_ANR_REPORTER',
                 'MOZ_ANDROID_BEAM',
                 'MOZ_ANDROID_CUSTOM_TABS',
                 'MOZ_ANDROID_DOWNLOADS_INTEGRATION',
diff --git a/mobile/android/base/java/org/mozilla/gecko/activitystream/ActivityStream.java b/mobile/android/base/java/org/mozilla/gecko/activitystream/ActivityStream.java
index ba6eaf795887..a1732b32f70e 100644
--- a/mobile/android/base/java/org/mozilla/gecko/activitystream/ActivityStream.java
+++ b/mobile/android/base/java/org/mozilla/gecko/activitystream/ActivityStream.java
@@ -63,11 +63,6 @@ public class ActivityStream {
      * Is the user eligible to use activity stream or should we hide it from settings etc.?
      */
     public static boolean isUserEligible(Context context) {
-        if (AppConstants.MOZ_ANDROID_ACTIVITY_STREAM) {
-            // If the build flag is enabled then just show the option to the user.
-            return true;
-        }
-
         if (AppConstants.NIGHTLY_BUILD && SwitchBoard.isInExperiment(context, Experiments.ACTIVITY_STREAM)) {
             // If this is a nightly build and the user is part of the activity stream experiment then
             // the option should be visible too. The experiment is limited to Nightly too but I want
diff --git a/mobile/android/base/java/org/mozilla/gecko/preferences/GeckoPreferences.java b/mobile/android/base/java/org/mozilla/gecko/preferences/GeckoPreferences.java
index 6b8ac04dd29d..65525b01acd2 100644
--- a/mobile/android/base/java/org/mozilla/gecko/preferences/GeckoPreferences.java
+++ b/mobile/android/base/java/org/mozilla/gecko/preferences/GeckoPreferences.java
@@ -714,7 +714,6 @@ public class GeckoPreferences
                     i--;
                     continue;
                 } else if (PREFS_CATEGORY_EXPERIMENTAL_FEATURES.equals(key)
-                        && !AppConstants.MOZ_ANDROID_ACTIVITY_STREAM
                         && !AppConstants.MOZ_ANDROID_CUSTOM_TABS) {
                     preferences.removePreference(pref);
                     i--;
diff --git a/mobile/android/base/moz.build b/mobile/android/base/moz.build
index c410dc7c634a..77a1e6831888 100644
--- a/mobile/android/base/moz.build
+++ b/mobile/android/base/moz.build
@@ -1123,8 +1123,7 @@ for var in ('MOZ_ANDROID_ANR_REPORTER', 'MOZ_DEBUG',
             'MOZ_ANDROID_DOWNLOADS_INTEGRATION', 'MOZ_INSTALL_TRACKING',
             'MOZ_ANDROID_GCM', 'MOZ_ANDROID_EXCLUDE_FONTS', 'MOZ_LOCALE_SWITCHER',
             'MOZ_ANDROID_BEAM', 'MOZ_ANDROID_DOWNLOAD_CONTENT_SERVICE',
-            'MOZ_SWITCHBOARD', 'MOZ_ANDROID_CUSTOM_TABS',
-            'MOZ_ANDROID_ACTIVITY_STREAM'):
+            'MOZ_SWITCHBOARD', 'MOZ_ANDROID_CUSTOM_TABS'):
     if CONFIG[var]:
         DEFINES[var] = 1
 
diff --git a/mobile/android/chrome/content/browser.js b/mobile/android/chrome/content/browser.js
index a3c3f919770f..e903a1cb71c6 100644
--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -4080,7 +4080,7 @@ Tab.prototype = {
           this.browser.addEventListener("pagehide", listener, true);
         }
 
-        if (AppConstants.NIGHTLY_BUILD || AppConstants.MOZ_ANDROID_ACTIVITY_STREAM) {
+        if (AppConstants.NIGHTLY_BUILD) {
           if (!docURI.startsWith("about:")) {
             WebsiteMetadata.parseAsynchronously(this.browser.contentDocument);
           }
diff --git a/mobile/android/moz.configure b/mobile/android/moz.configure
index 0ab0b113e274..b422fb8e3722 100644
--- a/mobile/android/moz.configure
+++ b/mobile/android/moz.configure
@@ -48,13 +48,6 @@ project_flag('MOZ_SWITCHBOARD',
              help='Include Switchboard A/B framework on Android',
              default=True)
 
-option(env='MOZ_ANDROID_ACTIVITY_STREAM',
-       help='Enable Activity Stream on Android (replacing the default HomePager)',
-       default=False)
-
-set_config('MOZ_ANDROID_ACTIVITY_STREAM',
-           depends_if('MOZ_ANDROID_ACTIVITY_STREAM')(lambda _: True))
-
 option(env='MOZ_ANDROID_PACKAGE_INSTALL_BOUNCER',
        help='Build and package the install bouncer APK',
        default=True)
diff --git a/toolkit/modules/AppConstants.jsm b/toolkit/modules/AppConstants.jsm
index e7de28bba27a..e4690be0ea1e 100644
--- a/toolkit/modules/AppConstants.jsm
+++ b/toolkit/modules/AppConstants.jsm
@@ -302,13 +302,6 @@ this.AppConstants = Object.freeze({
   false,
 #endif
 
-  MOZ_ANDROID_ACTIVITY_STREAM:
-#ifdef MOZ_ANDROID_ACTIVITY_STREAM
-  true,
-#else
-  false,
-#endif
-
   DLL_PREFIX: "@DLL_PREFIX@",
   DLL_SUFFIX: "@DLL_SUFFIX@",