If we had more of an understanding of what this would be used for, we may be able to give a better solution.
Thanks @@Forbsie1888, the idea is to transform tab-based web browsing to a board that contains iframes. Even if the website is responsive, it would be better if the user could use the mobile version inside the iframe...this way:
1- websites that have a mobile version will take mobile shape and functionality
2- websites that do not but are responsive will take the shape of the iframe
3- websites that are neiher will have scrollbars.
all thoughts and suggestions are appreciated