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I recently decided to test run my website to see how its performing using GTmetrix and the result is very poor (PageSpeed Score - 49%, YSlow Score - 47%). I am seeing a host of issues resorted but one is a bit confusing to me.

Leverage browser caching for the following cacheable resources:

https://quickresource.eyereturn.com/eyebuild/eyebuild_1_19.js
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/GC.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/actual-offer.jpg
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/and.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/border300x250.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/close.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/copy_01.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/copy_02.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/copy_05.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/cta.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/dot.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/heart_l.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/heart_r.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/logo.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/logo_02.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/mobile.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/offer.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/images/offer_link.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_300x250_EN_v1/index_edge.js
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/GC.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/actual-offer.jpg
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/and.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/bbym-blk.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/bbym.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/borde728x90.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/close.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/copy_01.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/copy_02.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/copy_03.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/copy_05.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/cta.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/dot.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/heart_l.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/heart_r.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/logo.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/mobile.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/offer.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/images/offer_link.png
(expiration not specified)
https://secure.eyereturn.com/25127/0324_FF_Offer_728x90_EN_v1/index_edge.js
(expiration not specified)
https://animate.adobe.com/runtime/5.0.0/edge.5.0.0.min.js (15 minutes)
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js (1
hour) https://pagead2.googlesyndication.com/pagead/osd.js (1 hour)
https://www.google-analytics.com/analytics.js (2 hours)P

What is "secure.eyereturn.com" and where I can find it and remove it?

5
  • Are you using a cdn? Check your js files it might be modifying your files.
    – Abu Nooh
    Commented Mar 25, 2017 at 14:55
  • Yes I am using a CDN. I was begining to suspect the CDN but wasn't sure. Which JS files should I look for? Or can I just do without this whole CDN thing? Thanks Commented Mar 25, 2017 at 14:59
  • OK not sure why but when I remove ONLY ads in the widget of my homepage then these warning disappears. So just trying to figure out if this is normal and nothing anyone can do about it. Commented Mar 25, 2017 at 16:53
  • What kind of ads are they? Adsense?
    – Abu Nooh
    Commented Mar 25, 2017 at 17:23
  • @AbuNooh Yes they are adsense Commented Mar 26, 2017 at 7:28

1 Answer 1

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This comes from your AdSense ads. You can't control how ad networks specify their cache control headers. Your only real option to "fix" this problem is to remove the ads.

PageSpeed, GTmetrix and YSlow are a bit dumb about this. They really shouldn't be reporting the cache control headers of third party resources. Especially when the resources are loaded asynchronously (as is the case with AdSense).

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