--- a/browser/chrome/browser/devtools/debugger.properties
+++ b/browser/chrome/browser/devtools/debugger.properties
@@ -72,16 +72,20 @@ stepOutTooltip=Sortir de la fonction (%S
 # LOCALIZATION NOTE (emptyGlobalsText): The text to display in the menulist
 # when there are no chrome globals available.
 noGlobalsText=Aucune variable globale
 
 # LOCALIZATION NOTE (noSourcesText): The text to display in the sources menu
 # when there are no scripts.
 noSourcesText=Cette page ne possède aucune source.
 
+# LOCALIZATION NOTE (loadingSourcesText): The text to display in the sources menu
+# when waiting for scripts to load.
+loadingSourcesText=En attente des sources…
+
 # LOCALIZATION NOTE (noEventListenersText): The text to display in the events tab
 # when there are no events.
 noEventListenersText=Aucun écouteur d'évènement à afficher
 
 # LOCALIZATION NOTE (noStackFramesText): The text to display in the call stack tab
 # when there are no stack frames.
 noStackFramesText=Aucun cadre de pile à afficher