This is just not true:

> Each time one opens a tab

you can customize to look exactly how you want it.

This is my new tab page: https://imgur.com/TpSzOCZ

> Every week in my mailbox

Don't subscribe to newsletters you don't enjoy.

> When opening any other website and their popup is here to tell me « You’re protected! »

You get this the first time only or after an update with new features.

> When one opens a website and FF asks « Do you want to install this privacy extension? », pointing at the Facebook jail or the container feature.

I don't like the recommended extensions thingy but it can be disabled https://imgur.com/xjTG4N2

> When suggesting to use Pocket or any new idea

Any new idea? really? we should just stop innovation.