diff --git a/browser/app/macbuild/Contents/MacOS-files.in b/browser/app/macbuild/Contents/MacOS-files.in
index 32ebf105f3ee..849336bc9be6 100644
--- a/browser/app/macbuild/Contents/MacOS-files.in
+++ b/browser/app/macbuild/Contents/MacOS-files.in
@@ -5,6 +5,5 @@
 /gtest/***
 /pk12util
 /ssltunnel
-/webapprt-stub
 /xpcshell
 /XUL
diff --git a/browser/installer/package-manifest.in b/browser/installer/package-manifest.in
index 7cbeb3b8c7df..125354ff90a7 100644
--- a/browser/installer/package-manifest.in
+++ b/browser/installer/package-manifest.in
@@ -856,11 +856,7 @@ bin/libfreebl_32int64_3.so
 #ifdef XP_WIN
 @BINPATH@/webapp-uninstaller@BIN_SUFFIX@
 #endif
-#ifdef XP_MACOSX
-@APPNAME@/Contents/MacOS/webapprt-stub@BIN_SUFFIX@
-#else
 @BINPATH@/webapprt-stub@BIN_SUFFIX@
-#endif
 @BINPATH@/webapprt/webapprt.ini
 @BINPATH@/webapprt/chrome.manifest
 @BINPATH@/webapprt/chrome/webapprt@JAREXT@
diff --git a/testing/mochitest/mach_commands.py b/testing/mochitest/mach_commands.py
index f3851448ac68..581323a03b67 100644
--- a/testing/mochitest/mach_commands.py
+++ b/testing/mochitest/mach_commands.py
@@ -92,7 +92,7 @@ def get_webapp_runtime_path(self):
         appname = 'webapprt-stub' + mozinfo.info.get('bin_suffix', '')
         if sys.platform.startswith('darwin'):
             appname = os.path.join(self.distdir, self.substs['MOZ_MACBUNDLE_NAME'],
-            'Contents', 'MacOS', appname)
+            'Contents', 'Resources', appname)
         else:
             appname = os.path.join(self.distdir, 'bin', appname)
         return appname
diff --git a/testing/testsuite-targets.mk b/testing/testsuite-targets.mk
index 2143ed000956..a1b0b3af2e8d 100644
--- a/testing/testsuite-targets.mk
+++ b/testing/testsuite-targets.mk
@@ -169,7 +169,7 @@ endif
 	$(CHECK_TEST_ERROR)
 
 ifeq ($(OS_ARCH),Darwin)
-webapprt_stub_path = $(TARGET_DIST)/$(MOZ_MACBUNDLE_NAME)/Contents/MacOS/webapprt-stub$(BIN_SUFFIX)
+webapprt_stub_path = $(TARGET_DIST)/$(MOZ_MACBUNDLE_NAME)/Contents/Resources/webapprt-stub$(BIN_SUFFIX)
 endif
 ifeq ($(OS_ARCH),WINNT)
 webapprt_stub_path = $(TARGET_DIST)/bin/webapprt-stub$(BIN_SUFFIX)
diff --git a/toolkit/webapps/MacNativeApp.js b/toolkit/webapps/MacNativeApp.js
index 0e12503f5985..dadd6c43ed45 100644
--- a/toolkit/webapps/MacNativeApp.js
+++ b/toolkit/webapps/MacNativeApp.js
@@ -222,7 +222,8 @@ NativeApp.prototype = {
 
   _copyPrebuiltFiles: function(aDir) {
     let destDir = getFile(aDir, this.macOSDir);
-    let stub = getFile(this.runtimeFolder, "webapprt-stub");
+    let stub = getFile(OS.Path.join(OS.Path.dirname(this.runtimeFolder),
+                                    "Resources"), "webapprt-stub");
     stub.copyTo(destDir, "webapprt");
   },
 
diff --git a/webapprt/mac/webapprt.mm b/webapprt/mac/webapprt.mm
index dea620e4d44c..4e2299ad207b 100644
--- a/webapprt/mac/webapprt.mm
+++ b/webapprt/mac/webapprt.mm
@@ -166,7 +166,7 @@
 
       //we know the firefox path, so copy the new webapprt here
       NSString *newWebRTPath =
-        [NSString stringWithFormat: @"%@%s%s", firefoxPath, APP_MACOS_PATH,
+        [NSString stringWithFormat: @"%@%s%s", firefoxPath, APP_RESOURCES_PATH,
                                                WEBAPPRT_EXECUTABLE];
       NSLog(@"### Firefox webapprt path: %@", newWebRTPath);
       if (![fileClerk fileExistsAtPath:newWebRTPath]) {