Interessante!
From: http://benfrain.com/test-your-sass-or-css-with-the-chrome-developer-tools/
http://benfrain.com/assets/Ben-Frain-csssummit2013-day2-v2.pdf
 
Quetso un pochino:
 
http://webdesign.tutsplus.com/articles/faster-htmlcss-workflow-with-chrome-developer-tools–webdesign-8314
 
Manualistica:
https://getfirebug.com/wiki
 
 
Stylys plugin https://userstyles.org/firstrun