My Marvin is slow, what can I do to improve performance?

How to check the console for errors

In case we ask you to look for errors in your browser's console, here's how you do it.

Help! My mini buttons are not showing anymore

Why don't tasks created in Marvin get synced to my calendar?

What is my iCloud Calendar URL and why do I need it?

Help: Marvin is not loading

Marvin just keeps on running