whole embedder is small in tabs

Hi,

I found that whenever I embedded the pdfs in tabs, only the first tab would display correctly(width and height 100%).
The second tab and the rest followed would gives smaller embedded pdfs. It’s nearly 40% smaller of the original. The whole frame and content and toolbar are smaller in size.
However, once I clicked + (zoom in) to 110% the entire embed frame and content becomes 100% in width and height.

It seems that the element.style is overriding the plugin’s set width and height, is this the problem?

How to fix this? I am really in need of pdfs embedded in tabs.
Please help!

Thanks!!!