First, I had to add the CacheViewer manually with the personalize menu option since it didn't show anywhere
When I hit the button I have this message:
Erreur d'analyse XML : entité non définie Emplacement : chrome://cacheviewer/content/cacheviewer.xul Numéro de ligne 160, Colonne 7 : <label value="&selectcount.label;"/> ------^
Why chrome? :O
anyway, what's wrong?