For some reason, FF needs this on this particular element.

diff --git a/imp/themes/screen-dimp.css b/imp/themes/screen-dimp.css
index dc50ba2..865dbe0 100644 (file)
--- a/imp/themes/screen-dimp.css
+++ b/imp/themes/screen-dimp.css
@@ -369,7 +369,7 @@ div.vpRowVert.flagUnseen {
     cursor: pointer;
 }
 
-#logo, #dimpbarActions, #serviceActions, #foldersSidebar {
+#logo, #dimpbarActions, #serviceActions, #foldersSidebar, #normalfolders {
     overflow-x: hidden;
 }