diff --git a/app/build.sh b/app/build.sh
index 264200b74d..527739a171 100755
--- a/app/build.sh
+++ b/app/build.sh
@@ -324,7 +324,6 @@ if [ $DEVTOOLS -eq 1 ]; then
 	echo >> $prefs_file
 	echo "// Dev Tools" >> $prefs_file
 	echo 'pref("devtools.debugger.remote-enabled", true);' >> $prefs_file
-	echo 'pref("devtools.debugger.remote-port", 6100);' >> $prefs_file
 	if [ $UPDATE_CHANNEL != "beta" ]; then
 		echo 'pref("devtools.debugger.prompt-connection", false);' >> $prefs_file
 	fi
diff --git a/app/scripts/build_and_run b/app/scripts/build_and_run
index b761e59d4c..92f7614055 100755
--- a/app/scripts/build_and_run
+++ b/app/scripts/build_and_run
@@ -63,7 +63,7 @@ if [ $SKIP_BUNDLED_FILES -eq 1 ]; then
 	PARAMS="$PARAMS -ZoteroSkipBundledFiles"
 fi
 if [ $DEBUGGER -eq 1 ]; then
-	PARAMS="$PARAMS -debugger"
+	PARAMS="$PARAMS -jsdebugger"
 fi
 
 if [ "`uname`" = "Darwin" ]; then