--- a/toolkit/xre/nsEmbedFunctions.cpp
+++ b/toolkit/xre/nsEmbedFunctions.cpp
@@ -526,27 +526,29 @@ XRE_InitChildProcess(int aArgc,
 #ifdef OS_POSIX
   if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS") ||
       PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE")) {
 #if defined(XP_LINUX) && defined(DEBUG)
     if (prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0) != 0) {
       printf_stderr("Could not allow ptrace from any process.\n");
     }
 #endif
-    printf_stderr("\n\nCHILDCHILDCHILDCHILD\n  debug me @ %d\n\n",
+    printf_stderr("\n\nCHILDCHILDCHILDCHILD (process type %s)\n  debug me @ %d\n\n",
+                  XRE_ChildProcessTypeToString(XRE_GetProcessType()),
                   base::GetCurrentProcId());
     sleep(GetDebugChildPauseTime());
   }
 #elif defined(OS_WIN)
   if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS")) {
     NS_DebugBreak(NS_DEBUG_BREAK,
                   "Invoking NS_DebugBreak() to debug child process",
                   nullptr, __FILE__, __LINE__);
   } else if (PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE")) {
-    printf_stderr("\n\nCHILDCHILDCHILDCHILD\n  debug me @ %d\n\n",
+    printf_stderr("\n\nCHILDCHILDCHILDCHILD (process type %s)\n  debug me @ %d\n\n",
+                  XRE_ChildProcessTypeToString(XRE_GetProcessType()),
                   base::GetCurrentProcId());
     ::Sleep(GetDebugChildPauseTime());
   }
 #endif
 
   // child processes launched by GeckoChildProcessHost get this magic
   // argument appended to their command lines
   const char* const parentPIDString = aArgv[aArgc-1];