So, I could be crazy/stupid (why not both?), but:
Take this page for example: http://staging.darkjedibrotherhood.com/competitions/6851
- In Firefox 20.0.1, middle mouse clicking a link, such as the link to James' dossier page, does nothing. On all other places (say on google.com), middle mouse clicking will open up the link in a new tab.
- It works as normal in Internet Explorer 10 and Chrome 26.0.1410.64
Edit: I just downloaded Nightly (Firefox 23.0a1 (2013-04-13) I guess?) - and it works fine - so it might be some sort of disconnect between the current (release) version of Firefox and the site.
Was a bug in Bootstrap. Fixed now.