Salesforce: Set a Browser Cookie to Enable Debug Logging for Guest Users Earlier it was very easy to create a debug log for Site Guest User. We just needed to request a debug log for the Site Guest User and the logs were generated without any hassle. But after the Winter 17 release, you now also need to set a server cookie in the browser to enable debug logs for Site Guest Users. This means that debug logs will only be generated for those doing the debugging, not everyone accessing the site. This is true for sandboxes also. Follow the below steps to generate a debug log from a Force.com Site Guest User: 1. Request a debug log the Site Guest User like we do for a Salesforce User. 2. Open the Force.com Site URL. 3. Press F12 or Ctrl+Shift+i to open the browser debugger. 4. Open the console of the debugger. 5. Write the below code in the console and press Enter: document.cookie="debug_logs=debug_logs ;domain=.force.com" ...