--- a/xpcom/io/nsDirectoryServiceDefs.h
+++ b/xpcom/io/nsDirectoryServiceDefs.h
@@ -26,18 +26,16 @@
 #define NS_OS_TEMP_DIR                          "TmpD"
 #define NS_OS_CURRENT_WORKING_DIR               "CurWorkD"
 /* Files stored in this directory will appear on the user's desktop,
  * if there is one, otherwise it's just the same as "Home"
  */
 #define NS_OS_DESKTOP_DIR                       "Desk"
 
 /* Property returns the directory in which the procces was started from.
- * On Unix this will be the path in the MOZILLA_FIVE_HOME env var and if
- * unset will be the current working directory.
  */
 #define NS_OS_CURRENT_PROCESS_DIR               "CurProcD"
 
 /* This location is similar to NS_OS_CURRENT_PROCESS_DIR, however,
  * NS_XPCOM_CURRENT_PROCESS_DIR can be overriden by passing a "bin
  * directory" to NS_InitXPCOM2().
  */
 #define NS_XPCOM_CURRENT_PROCESS_DIR            "XCurProcD"