This site does not require loading doubleclick code but that's what our ad server runs and thus gets called much of the time. While we don't particularly recommend or like that our members block our advertising for obvious reasons, blocking the doubleclick domain alone should not result in the whole site not loading.
That said, because this is a configuration problem unique to you given the browser configuration and domain blocking, there is little or nothing we can do to help from our end. Hope the explanation helps for figuring out a more proper config.