Created attachment 393346 [details] Showing Firefox' style inspector With javascript disabled the styles are broken. Here it is the pseudo-element :before on class .glyphicon-remove not showing the expected image of a very bold x which is displayed when javascript is on. Using javascript for that purpose is a very bad idea.
Cannot reproduce. Your screenshot indicates that webfont support is broken in your browser and that is likely the cause of this.
Created attachment 393348 [details] display with 'noscript' on
Created attachment 393350 [details] Display with 'noscript' off
'NoScript' which you are likely using is doing more than just fiddling with scripting, it for instance also disables @font-face.
Created attachment 393354 [details] Solution in noscript settings That solves it. Sorry for the noise!!