a friend tells me when he visits davidfreundphotography.com he gets a firefox security alert. Fix?

hi, that probably depends on how you're accessing the page - through http or https. in the latter case your site doesn't have a proper certificate setup at the moment which would be trusted by browsers. mozilla is supporting an effort to get as many parts of the web to https as possible and is part of the "let's encrypt" initiative which is going to give away free certificates for websites soon: https://letsencrypt.org/