I think he refers to this: https://www.keycdn.com/support/how-to-u ... ee-domains
In the case of OpenCart there is nothing much you can do to improve performance when it comes to the usage of cookies.
Sites like gtmetrix come up with all sorts of generic recommendations which you can safely ignore.
MHC Web Design
Override Engine * Integrated VQMod * Unused Images Manager * Instant Option Price Calculator * TrustPilot Reviews * Google Rich Snippets * Google Tag Manager * Export/Import Tool * Template Switcher PHP/Twig
But I've sent him the Mod by PM, so, the problem should be solved by now, I assume.
I'm rarely active at the OC Forum lately. To reach me, contact: firstname.lastname@example.org
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can be seen in real Action here: http://www.jti.li/shop/
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