Creating a chrome extension that allow you see a HTML in all tabs : I was think in a project to study how Google Extensions works, 
what is my idea? 
I want to create a HTML that works in all tabs in the same moment.

Example: I'm in the first tab of Chrome and will have a button in html element when I press the button appears a div saying "Yes" and when I switch the tab for the second, the idea is the div saying "Yes" will continue in the same place.

The best scenario for me is the same DIV that are in the first tab will be the same in the second. 

For this project I need to know if it is possible and how do and start to do this,

Thanks!!