Our detectives are back with the following intel on this WordPress site
The site is using the Angrybirds.com theme by Evermade Oy .
We could identify 2 plugins (there might be more) -
W3 Total Cache
This information was last updated 24 March, 2017
Theme for Rovio's Angrybirds.com by Evermade.
W3 Total Cache improves the SEO and user experience of your site by increasing website performance, reducing download times via features like content …
Improve your WordPress SEO: Write better content and have a fully optimized WordPress site using the Yoast SEO plugin.