I-frame tabs, auto height

Hello, I need to place 3 Iframes on a Joomla! website, frames from a different domain. 1. To load these frames on 1 page I am using Bootstrap Tabs. I have made 3 bootstrap tabs (with an extension), now I want the same without the extension. My template loads bootstrap so it is just a small css job. 2. The Iframes should auto adjust to the content of the frame, without scroll bar. Keep in mind that it is cross-domain. For SEO purposes I will show example link only in chat.