1 files changed, 6 insertions, 2 deletions
diff --git a/browser/app/winlauncher/LauncherProcessWin.cpp b/browser/app/winlauncher/LauncherProcessWin.cpp
index b40e0fceb5..81d4ee91e9 100644
--- a/browser/app/winlauncher/LauncherProcessWin.cpp
+++ b/browser/app/winlauncher/LauncherProcessWin.cpp
@@ -401,8 +401,12 @@ Maybe<int> LauncherMain(int& argc, wchar_t* argv[],
   }
 #endif  // defined(MOZ_LAUNCHER_PROCESS)
 
-  // Now proceed with setting up the parameters for process creation
-  UniquePtr<wchar_t[]> cmdLine(MakeCommandLine(argc, argv));
+  // Now proceed with setting up the parameters for process creation.
+  constexpr static const wchar_t* extraArgs[] = {
+      L"/prefetch:1",  // for APFL; see ipc/glue/GeckoChildProcessHost.cpp
+  };
+  UniquePtr<wchar_t[]> cmdLine(
+      MakeCommandLine(argc, argv, ARRAYSIZE(extraArgs), extraArgs));
   if (!cmdLine) {
     HandleLauncherError(LAUNCHER_ERROR_GENERIC());
     return Nothing();