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Developer console not displaying
In my sandbox, the developer console won't display. It opens up a window, immediately resizes to a very small window and hangs. Chrome eventually times out and I have to kill the session. I can pull up the console in my production account.

Try this and check your Chrome settings: Advanced Settings, Privacy, click Content button, scroll down to Popup section. Make sure 'Allow all sites to show Popups' is checked.