Thank you for participating in the Slingbox Answers Forum. I do apologize about the inconvenience, but we are currently aware of the issue happening within the Firefox browser and are working on resolving this issue. You can try closing the browser and re-opening and if the same thing is occurring we will soon have a permanent fix for this. If you have any other questions, feel free to contact us via our Chat Support or Phone Support at 877-467-5464.
The Sling Moderation Team