On my computer at work, I installed Reddit Enhancement Suite, and it applied itself to Firefox immediately.

At home, I've installed it and nothing happens. I've uninstalled it and reinstalled it. It says it's enabled, but none of its features are showing or available. The plugins management page says that it's enabled. Restarting the browser doesn't help. Restarting the computer doesn't help. Can anyone help to shed some light on why this isn't working? Thank you.