diff --git a/mobile/android/base/java/org/mozilla/gecko/GeckoEvent.java b/mobile/android/base/java/org/mozilla/gecko/GeckoEvent.java
index d66e3ab8b2a0..d140c5e1176d 100644
--- a/mobile/android/base/java/org/mozilla/gecko/GeckoEvent.java
+++ b/mobile/android/base/java/org/mozilla/gecko/GeckoEvent.java
@@ -77,7 +77,6 @@ public class GeckoEvent {
         APP_FOREGROUNDING(10),
         LOAD_URI(12),
         NOOP(15),
-        BROADCAST(19),
         VIEWPORT(20),
         VISITED(21),
         NETWORK_CHANGED(22),
@@ -461,14 +460,6 @@ public class GeckoEvent {
         return event;
     }
 
-    @RobocopTarget
-    public static GeckoEvent createBroadcastEvent(String subject, String data) {
-        GeckoEvent event = GeckoEvent.get(NativeGeckoEvent.BROADCAST);
-        event.mCharacters = subject;
-        event.mCharactersExtra = data;
-        return event;
-    }
-
     public static GeckoEvent createViewportEvent(ImmutableViewportMetrics metrics, DisplayPortMetrics displayPort) {
         GeckoEvent event = GeckoEvent.get(NativeGeckoEvent.VIEWPORT);
         event.mCharacters = "Viewport:Change";
diff --git a/widget/android/AndroidJNI.cpp b/widget/android/AndroidJNI.cpp
index 90ba665a2dc1..c2e1afdd317a 100644
--- a/widget/android/AndroidJNI.cpp
+++ b/widget/android/AndroidJNI.cpp
@@ -63,29 +63,6 @@ Java_org_mozilla_gecko_GeckoAppShell_notifyGeckoOfEvent(JNIEnv *jenv, jclass jc,
     nsAppShell::PostEvent(AndroidGeckoEvent::MakeFromJavaObject(jenv, event));
 }
 
-NS_EXPORT void JNICALL
-Java_org_mozilla_gecko_GeckoAppShell_notifyGeckoObservers(JNIEnv *aEnv, jclass,
-                                                         jstring aTopic, jstring aData)
-{
-    if (!NS_IsMainThread()) {
-        jni::ThrowException(aEnv,
-            "java/lang/IllegalThreadStateException", "Not on Gecko main thread");
-        return;
-    }
-
-    nsCOMPtr<nsIObserverService> obsServ =
-        mozilla::services::GetObserverService();
-    if (!obsServ) {
-        jni::ThrowException(aEnv,
-            "java/lang/IllegalStateException", "No observer service");
-        return;
-    }
-
-    const nsJNICString topic(aTopic, aEnv);
-    const nsJNIString data(aData, aEnv);
-    obsServ->NotifyObservers(nullptr, topic.get(), data.get());
-}
-
 NS_EXPORT jlong JNICALL
 Java_org_mozilla_gecko_GeckoAppShell_runUiThreadCallback(JNIEnv* env, jclass)
 {
diff --git a/widget/android/AndroidJavaWrappers.cpp b/widget/android/AndroidJavaWrappers.cpp
index ddb850e809a2..5a7f2bde3338 100644
--- a/widget/android/AndroidJavaWrappers.cpp
+++ b/widget/android/AndroidJavaWrappers.cpp
@@ -390,8 +390,7 @@ AndroidGeckoEvent::Init(JNIEnv *jenv, jobject jobj)
             break;
         }
 
-        case VIEWPORT:
-        case BROADCAST: {
+        case VIEWPORT: {
             ReadCharactersField(jenv);
             ReadCharactersExtraField(jenv);
             break;
diff --git a/widget/android/AndroidJavaWrappers.h b/widget/android/AndroidJavaWrappers.h
index 7970606baf35..f2da9b1df7fc 100644
--- a/widget/android/AndroidJavaWrappers.h
+++ b/widget/android/AndroidJavaWrappers.h
@@ -444,14 +444,6 @@ public:
         return event;
     }
 
-    static AndroidGeckoEvent* MakeBroadcastEvent(const nsCString& topic, const nsCString& data) {
-        AndroidGeckoEvent* event = new AndroidGeckoEvent();
-        event->Init(BROADCAST);
-        CopyUTF8toUTF16(topic, event->mCharacters);
-        CopyUTF8toUTF16(data, event->mCharactersExtra);
-        return event;
-    }
-
     static AndroidGeckoEvent* MakeAddObserver(const nsAString &key, nsIObserver *observer) {
         AndroidGeckoEvent *event = new AndroidGeckoEvent();
         event->Init(ADD_OBSERVER);
@@ -641,7 +633,6 @@ public:
         LOAD_URI = 12,
         NOOP = 15,
         APZ_INPUT_EVENT = 17, // used internally in AndroidJNI/nsAppShell/nsWindow
-        BROADCAST = 19,
         VIEWPORT = 20,
         VISITED = 21,
         NETWORK_CHANGED = 22,
diff --git a/widget/android/nsAppShell.cpp b/widget/android/nsAppShell.cpp
index 138d3ba16749..781ed3b85c3b 100644
--- a/widget/android/nsAppShell.cpp
+++ b/widget/android/nsAppShell.cpp
@@ -678,8 +678,7 @@ nsAppShell::LegacyGeckoEvent::Run()
         break;
     }
 
-    case AndroidGeckoEvent::VIEWPORT:
-    case AndroidGeckoEvent::BROADCAST: {
+    case AndroidGeckoEvent::VIEWPORT: {
         if (curEvent->Characters().Length() == 0)
             break;