Click icon open the devtools, validates. Then show the result in the icon directly and not the tab.

Created by: mgueury

Seen that there is no way to change the panel. There is still a way to change the icon. Then use this.

Make a test version out of this. Ideally, this would mean that the emscripten library should be called from the devtools page. Ideally, this would be shared between pages....