Visual indicator for when you're on a production server vs. when you're on a development server.
This extension allows you to enter in URLs for your production and development domains so that you can have a visual indicator as to whether you are on prod or a dev domain. Useful for not having to constantly worry about what site you're on!
https://github.com/MrJustPeachy/Field-Completer-Chrome-Extension - source code.