diff --git a/browser/components/BrowserComponents.manifest b/browser/components/BrowserComponents.manifest
index dbfc3d2ec4..0c80006beb 100644
--- a/browser/components/BrowserComponents.manifest
+++ b/browser/components/BrowserComponents.manifest
@@ -39,6 +39,4 @@ component {eab9012e-5f74-4cbc-b2b5-a590235513cc} nsBrowserGlue.js
 contract @mozilla.org/browser/browserglue;1 {eab9012e-5f74-4cbc-b2b5-a590235513cc}
 category app-startup nsBrowserGlue service,@mozilla.org/browser/browserglue;1 application={3c2e2abc-06d4-11e1-ac3b-374f68613e61} application={ec8030f7-c20a-464f-9b0e-13a3a9e97384} application={aa3c5121-dab2-40e2-81ca-7ea25febc110} application={a23983c0-fd0e-11dc-95ff-0800200c9a66} application={d1bfe7d9-c01e-4237-998b-7b5f960a4314}
 component {d8903bf6-68d5-4e97-bcd1-e4d3012f721a} nsBrowserGlue.js
-#ifndef MOZ_MULET
 contract @mozilla.org/content-permission/prompt;1 {d8903bf6-68d5-4e97-bcd1-e4d3012f721a}
-#endif
diff --git a/browser/installer/Makefile.in b/browser/installer/Makefile.in
index 55df797ef7..772d172093 100644
--- a/browser/installer/Makefile.in
+++ b/browser/installer/Makefile.in
@@ -13,11 +13,7 @@ MOZ_PKG_MANIFEST = $(srcdir)/package-manifest.in
 MOZ_PKG_DUPEFLAGS = -f $(srcdir)/allowed-dupes.mn
 
 # Some files have been already bundled with xulrunner
-ifndef MOZ_MULET
 MOZ_PKG_FATAL_WARNINGS = 1
-else
-DEFINES += -DMOZ_MULET
-endif
 
 # When packaging an artifact build not all xpt files expected by the
 # packager will be present.
diff --git a/browser/installer/package-manifest.in b/browser/installer/package-manifest.in
index 22a7a771aa..48973c6013 100644
--- a/browser/installer/package-manifest.in
+++ b/browser/installer/package-manifest.in
@@ -835,7 +835,3 @@ bin/libfreebl_32int64_3.so
 @RESPATH@/components/GfxSanityTest.manifest
 @RESPATH@/components/SanityTest.js
 #endif
-
-#ifdef MOZ_MULET
-#include ../../b2g/installer/package-manifest.in
-#endif
diff --git a/js/xpconnect/loader/mozJSComponentLoader.cpp b/js/xpconnect/loader/mozJSComponentLoader.cpp
index 95c2148677..85591bc8a3 100644
--- a/js/xpconnect/loader/mozJSComponentLoader.cpp
+++ b/js/xpconnect/loader/mozJSComponentLoader.cpp
@@ -306,14 +306,6 @@ mozJSComponentLoader::ReallyInit()
 
     mReuseLoaderGlobal = Preferences::GetBool("jsloader.reuseGlobal");
 
-    // XXXkhuey B2G child processes have some sort of preferences race that
-    // results in getting the wrong value.
-    // But we don't want that on Firefox Mulet as it break most Firefox JSMs...
-    // Also disable on debug builds to break js components that rely on this.
-#if defined(MOZ_B2G) && !defined(MOZ_MULET) && !defined(DEBUG)
-    mReuseLoaderGlobal = true;
-#endif
-
     nsCOMPtr<nsIScriptSecurityManager> secman =
         do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID);
     if (!secman)
diff --git a/old-configure.in b/old-configure.in
index 6b21f2854f..680d18472e 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -2430,10 +2430,6 @@ if test -n "$MOZ_GRAPHENE"; then
     AC_DEFINE(MOZ_GRAPHENE)
 fi
 
-if test -n "$MOZ_MULET"; then
-    AC_DEFINE(MOZ_MULET)
-fi
-
 # Propagate feature switches for code written in rust from confvars.sh
 if test -n "$MOZ_RUST"; then
     if test -n "$MOZ_RUST_MP4PARSE"; then
@@ -2446,7 +2442,6 @@ fi
 
 AC_SUBST(MOZ_XULRUNNER)
 AC_SUBST(MOZ_B2G)
-AC_SUBST(MOZ_MULET)
 AC_SUBST(MOZ_B2G_VERSION)
 
 dnl ========================================================
diff --git a/python/mozbuild/mozbuild/mozinfo.py b/python/mozbuild/mozbuild/mozinfo.py
index f0b0df9bb0..2c08c4e9f0 100644
--- a/python/mozbuild/mozbuild/mozinfo.py
+++ b/python/mozbuild/mozbuild/mozinfo.py
@@ -52,9 +52,7 @@ def build_dict(config, env=os.environ):
         d["appname"] = substs["MOZ_APP_NAME"]
 
     # Build app name
-    if 'MOZ_MULET' in substs and substs.get('MOZ_MULET') == "1":
-        d["buildapp"] = "mulet"
-    elif 'MOZ_BUILD_APP' in substs:
+    if 'MOZ_BUILD_APP' in substs:
         d["buildapp"] = substs["MOZ_BUILD_APP"]
 
     # processor