Enable SASS support for your Rails project within chrome using source maps

chrome-sass-source-maps.md

1. Goto chrome://flags and enable Enable Developer Tools experiments
2. Open de Developer toolbar and goto the General tab within settings. Check the Enable source maps
3. Restart chrome
4. Open de Developer toolbar and goto the Expirements tab. Check "Support for Sass"

Add the following to your config/environments/development.rb

config.assets.debug = true
config.sass.debug_info = true
config.sass.line_comments = false # source maps don't get output if this is true