New ToDo screen doesn't support keyboard focus navigation in Firefox

Summary

Keyboard focus navigation for the ToDo's (pressing tab to change focus) doesn't work in Firefox

Steps to reproduce

1. Go to your ToDos
2. Press tab and try to select one of the items or the "Mark as done" button

What is the current bug behavior?

Tab doesn't switch focus to the ToDo's items nor the "Mark as done" button

What is the expected correct behavior?

It should work 🙃

Relevant logs and/or screenshots

firefox_tab

Possible fixes

Firefox likely require to use tabindex attributes