Browser Test Between Chrome vs Firefox

Hi I have question about the differences between Chrome and Firefox.

Result from Chrome (DOM:2.828s)
http://www.webpagetest.org/result/141225_V2_9TA/1/details/

Result from Firefox (DOM:0.094s)
http://www.webpagetest.org/result/141225_PT_9WV/1/details/

Notice that the Chrome have a huge gap of domContentLoaded.

My website is Wordpress with W3TC plugin.

What might influence the DOM for Chrome browser?