diff --git a/xul/content/static.js b/xul/content/static.js
--- a/xul/content/static.js
+++ b/xul/content/static.js
@@ -3250,17 +3250,17 @@ function cli_installPlugin(name, source)
     }
 
     try {
         if (typeof source == "string")
             source = getFileFromURLSpec(source);
     }
     catch (ex)
     {
-        display(getMSg(MSG_INSTALL_PLUGIN_ERR_CHECK_SD, ex), MT_ERROR);
+        display(getMsg(MSG_INSTALL_PLUGIN_ERR_CHECK_SD, ex), MT_ERROR);
         return;
     }
 
     display(getMsg(MSG_INSTALL_PLUGIN_INSTALLING, [source.path, dest.path]),
             MT_INFO);
 
     if (source.path.match(/\.(jar|zip)$/i))
     {
@@ -3439,17 +3439,17 @@ function cli_installPlugin(name, source)
                 // We've appended "init.js" before, so go back up one level:
                 dest.parent.remove(true);
             }
         }
         catch(ex)
         {
             if (ex != CZ_PI_ABORT)
             {
-                display(getMSg(MSG_INSTALL_PLUGIN_ERR_INSTALLING, ex),
+                display(getMsg(MSG_INSTALL_PLUGIN_ERR_INSTALLING, ex),
                         MT_ERROR);
             }
         }
     }
     else
     {
         display(MSG_INSTALL_PLUGIN_ERR_FORMAT, MT_ERROR);
     }