Small images causes Too much page load time

Question

Below is the page load time of "Net" tab from Firebug. I dont know the reason why the small sized images took too mush time to load. I used gzip compression on my .htaccaess file. Works good in Chrome, but issues in firefox.

Screenshot of my site

Answer 1

I figured out the reason on search. This is due to more http requests. To reduce the request, CSS sprites can be used to combine small image into one large image.