This website would be blacklisted by Google’s Safe Browsing service, so I’m amazed other browsers do not block it, unless some security option for it is disabled or they don’t take security very seriously. In order to request removal for the blacklisted domain, please have a look at the links mentioned in the [[How does built-in Phishing and Malware Protection work?]] article (at the bottom). If you would just like to work around the issue, you could also disable the Safe Browsing feature in Firefox by unchecking the ''Block dangerous and deceptive content'' option in the Options > Security section, as described in the same support article.

See also: *https://www.google.com/transparencyreport/safebrowsing/diagnostic/index.html#url=concerttickets.us