diff --git a/startup/Site.cshrc b/startup/Site.cshrc
index 2f908ee1f..23453cb91 100755
--- a/startup/Site.cshrc
+++ b/startup/Site.cshrc
@@ -29,6 +29,8 @@ endif
 
 # Needed only by medm extension 
 #setenv EPICS_DISPLAY_PATH
+# Needed only by medm extension 
+setenv BROWSER firefox
 
 # Needed only by orbitscreen extension
 if ( ! $?ORBITSCREENHOME ) then
diff --git a/startup/Site.profile b/startup/Site.profile
index f68467431..5cb9b0273 100755
--- a/startup/Site.profile
+++ b/startup/Site.profile
@@ -32,6 +32,7 @@ fi
 
 # Needed only by medm extension
 #export EPICS_DISPLAY_PATH=/path/to/adl/files
+export BROWSER=firefox
 
 # Needed only by orbitscreen extension
 #if [ -z "${ORBITSCREENHOME}" ] ; then