Logo blurry in Chrome & IE, but crystal clear in FireFox
I’m sure this is throwing you for a loop. If your logo is blurry in Chrome and crystal clear in Firefox it is a simple fix. Your logo is scaled too large. Scale it down to 277 x 277 or somewhere in that range and that will do the trick. There is no tricky code required for this fix. Do not over think this, simply scale it down to a manageable size.
The other way to take care of this issue is to simply go into your Media Library in WordPress and click on your logo image. Edit this image so it is locked in as a thumbnail.
Don’t forget to clear your cache in Chrome too. This will help as well.
This is a common issue with WordPress Elegant Themes.