I love the to do ist. It help me so much!

Perfeito!

It's basically a pop-up window with the todoist app. Which means it loads just as slowly. If I'm going to wait for 3 seconds for the thing to load, I'd rather visit the full todoist website instead.

I'm not going to evaluate the service itself - just note that it's the best to-do list service I've found. Instead, this is the handiest way to access it. The first time I had my email up and pulled up the add-on, I was sold. It's much more handy than switching between windows. I especially like that it doesn't take up much screen real estate, allowing me to see the page I have open and the to-do list at the same time.