Ugh. You know, I don't expect the Motherfucking Website framework, but here are some of the external domains (excluding numerous subdomains) accessed when viewing this text article with a few images:
cloudfront.net
stripe.com
googleadservices.com
optimizely.com
webtype.com
bootstrapcdn.com
ads-twitter.com
disqus.com
facebook.net
optinmonster.com
google-analytics.com
twimg.com
optnmstr.com
mstrlytcs.com
facebook.com
newrelic.com
disquscdn.com
stripe.network
fastly.net