We are using a self hosted analytics service which do not track any personal data and respects DNT signal from browser. Other than that we don't use any tracking script/method.
Update: Adblock Plus was hiding body element as it had "headersocial" class. I have fixed the issue and the site is accessible with Adblock Plus on Firefox now.
Hey, I can replicate it in Firefox with Adblock Plus extension. Looks like there is a bug in the extension as we do not serve ads and the page is working well in Chrome with both Adblock and Adblock Plus extensions enabled.