This is really aimed at slightly more advanced users of Firefox  and Google Chrome as you will need the developers toolbar add on.

Once downloaded, in Firefox open the inspector and click on the "Net" tab, perform a hard refresh , and view the relevant files / images loading for this page.

Once applied to Google Chrome, open the inspector, click on the network tab, and perform a hard refresh .

Tip: From doing the above you can visibly see elements on screen that possibly can be optimised, ( mainly images ), thus reducing page load time / server bandwidth, and making it more SEO  friendly.