Is it possible to change the fullscreen behavior for Flash videos in the browser?

Question

Browsers

Good day.
Tell me, is there any extension for Chrome / FF that changes the standard behavior of the Flash video full-screen mode so that the video does not occupy the entire screen, overlapping the browser interface and OS, but only the page container in the browser?
That is, it is necessary that when the full-screen mode button is pressed, the video expands, covering all the content of the web page, but leaving browser tabs and other interface elements accessible.
Thank you.

Answer 1

Layer on top of the entire visible area of ​​the page ... - remind me when it stopped working?