Debugging Salesforce Sites in Salesforce after Winter '17 Release

Alright something learned today after fighting on turning on Debug.

Put this in the Javascript console:

document.cookie="debug_logs=.force.com;domain=.force.com"

https://salesforce.stackexchange.com/questions/143549/debug-logs-not-working-for-site-guest-users-force-com-sites-after-the-winter-1/143550#143550