Good to see another 'chromer'! I'll make my instructions really simple, just in case
First of all, what operating system are you using?
Windows 7, 8 or 10? Mac OSX 10.11? Ubuntu 14.04?
Next, what version of chrome are you using? you can find out at chrome://chrome/
What version of Flash are you running? You can find out HERE
Are you running any chrome extensions that may be using up bandwidth? You can check this out by going to chrome://extensions/
As for my streaming with Google Chrome, the only lag I experience with HD streaming is because of my bandwidth speeds and I encounter the same problems with Firefox 41.0.2 (latest version). Of course my system probably differs a lot from yours (i7-4770, Nvidia GTX 660, wired directly to the router).