I found something damn handy today! I was looking for the xrefesh firefox addon, but I could not find the addon page ! 404(https://addons.mozilla.org/af/firefox/addon/xrefresh/)
So I did some searching around for a good alternative… eventually I came across Livereload
It uses ruby and works on all platforms :win, os x, linux. I just set this up for the mac in about 4 minutes, it was quick and easy!
I would like to see a firefox version of this addon because I still prefer the tools I have in firefox to chrome. However It is awesome for some dual monitor web development, you can occasionally look over and see your words take shape.