Update strings.xml

The french translation is finished.

res/values-fr/strings.xml

@@ -15,11 +15,11 @@
     <string name="settingshelp">Les paramètres ne s\'appliqueront qu\'aux nouveaux onglets</string>
     <string name="fullscreen">Activer le mode plein écran</string>
     <string name="java">Activer JavaScript</string>
-    <string name="menu_history">History</string>
-    <string name="menu_add">Aj. Favoris</string>
+    <string name="menu_history">Historique</string>
+    <string name="menu_add">Aj. favoris</string>
     <string name="menu_bookmarks">Favoris</string>
     <string name="menu_share">Partager</string>
     <string name="menu_settings">Paramètres</string>
-    <string name="menu_incognito">Incognito tab</string>
-    <string name="menu_new_tab">New tab</string>
+    <string name="menu_incognito">Onglet incognito</string>
+    <string name="menu_new_tab">Nouvel onglet</string>
 </resources>