Close button position

Hi!
Like your app..thanks..
Small question:
I open an error message box like this:

new Messi(errorMessage, {title: 'Error', titleClass: 'error', buttons: [{id: 0, label: 'Close', val: 'X'}]});

And in Firefox (v. 25 or 28) the 'Close' button is placed on the left..but in IE, Chrome and Safari it is placed in the middle (like on your site screenshots)..
How can I place this button in the center in FF? )
Thank you!

[ahasverus]

Hi,
I had the same problem as you (I am on Mac OS X). I solved this issue.
Open the mess.min.css file and add this command :

@-moz-document url-prefix() {
.messi-actions {
width:90%;
text-align:center;
margin-left: 5%;
margin-right: 5%;
}
}

This works with me. I hope it will also help you.
Cheers.