In order to remove the iframe border in the browser I tried what Vaios mentioned but it didn’t work (if what he proposed was the same thing I was trying to do). Anyways, I found a way to remove the iframe border, just adding frameBorder=“0” in the html tag that goes inside the page.
Example: <iframe src="https://playcanv.as/e/b/zTajUHZ8/" height="700px" width="1920px" scrolling="no" frameborder="0"></iframe>