Seems to be the HTTPS Everywhere browser plugin that results in a blank page for me, debug console says:
platform.launchrock.com/v1/getLaunchedSiteInfo:1 POST https://platform.launchrock.com/v1/getLaunchedSiteInfo net::ERR_INSECURE_RESPONSE
platform.launchrock.com/v1/getClientIP:1 POST https://platform.launchrock.com/v1/getClientIP net::ERR_INSECURE_RESPONSE
Which makes sense, since the certificate for https://platform.launchrock.com has expired, if I disable HTTPS Everywhere, the site loads just fine.