You can find it in the theme you are using. The file is called login.tpl. For example for persona its here. https://github.com/NodeBB/nodebb-theme-persona/blob/master/templates/login.tpl#L15 The server sends in the value depending on what the ACP setting is set to. If you only allow login by username that value changes to Username etc.

Ahhhh, Why would you want to do something so evil!! Anyway, just call bootbox in the Custom HTML section of the ACP. (Make sure you check the box at the bottom.) <script> $(function(){ bootbox.alert("Welcome"); }); </script> Bootbox docs for more info: http://bootboxjs.com/

@agusputra said: It seems bug of facebook-sso. Read this : https://github.com/julianlam/nodebb-plugin-sso-facebook/issues/21 I've been having this issue too.

If your server can support apache or nginx you can make a reverse proxy to serve NodeBB to the outside.