We noticed that many people enable 2FA after they realize the services they already use support it! So, we made 2FA Notifier [1], an open source web extension that notifies you when sites you visit support 2FA. Anytime you visit a site that supports 2FA, you'll get a notification. Click it to go straight to the docs that explain how to enable 2FA!
Let me know if you take it for a spin! Any and all feedback is helpful to improve the functionality and UX.
Shout with questions and I'll do my best to answer!