Make sure you've disabled any web browser extensions (such as AdBlock, uBlock, Disconnect, etc.) which may otherwise interfere with some of Firecracker's functionalities. The Firecracker team keeps a running status update on the website's uptime and any maintenance, which you can check out online at status.firecracker.me
You may need to logout of Firecracker, and clear your web browser's cache and cookies before logging back in to ensure that you're using the most recently updated version of the website. Don't hesitate to send us a message at firstname.lastname@example.org and we are happy to help you with troubleshooting, additional resources and advice.