--- a/widget/android/AndroidJNI.cpp
+++ b/widget/android/AndroidJNI.cpp
@@ -131,22 +131,25 @@ Java_org_mozilla_gecko_GeckoAppShell_onR
     if (nsAppShell::gAppShell)
         nsAppShell::gAppShell->OnResume();
 }
 
 NS_EXPORT void JNICALL
 Java_org_mozilla_gecko_GeckoAppShell_reportJavaCrash(JNIEnv *jenv, jclass, jstring jStackTrace)
 {
 #ifdef MOZ_CRASHREPORTER
-    const nsJNIString stackTrace16(jStackTrace, jenv);
-    const NS_ConvertUTF16toUTF8 stackTrace8(stackTrace16);
-    CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("JavaStackTrace"), stackTrace8);
+    const nsJNICString stackTrace(jStackTrace, jenv);
+    if (NS_WARN_IF(NS_FAILED(CrashReporter::AnnotateCrashReport(
+            NS_LITERAL_CSTRING("JavaStackTrace"), stackTrace)))) {
+        // Only crash below if crash reporter is initialized and annotation succeeded.
+        // Otherwise try other means of reporting the crash in Java.
+        return;
+    }
 #endif // MOZ_CRASHREPORTER
-
-    abort();
+    MOZ_CRASH("Uncaught Java exception");
 }
 
 NS_EXPORT void JNICALL
 Java_org_mozilla_gecko_GeckoAppShell_notifyBatteryChange(JNIEnv* jenv, jclass,
                                                          jdouble aLevel,
                                                          jboolean aCharging,
                                                          jdouble aRemainingTime)
 {