Looks good.

When I blur or edit something, it stays after refresh
But when I remove a div, it comes back after reloading. I'd like to remove a lot of div on Gmail to declutter the interface and that looked like a good way to do it.. Could you fix this ? Thank you

also, I try clicking on a div that was far on the right and because of this, I couldn't see Datamask menu or interact with it, even tho the div was selected.