How do I zoom in my game?

Hi

When the game is running and I increase the zoom level of browser , resolution decreases but the game runs better and smoother.

I want to add this feature (browser zoom) to my game by pressing a sprite but I couldn't find any way for it.even theres no zooming action in "Browser plugin".

How can I do that?

There is no zoom like you can do in a web page. All the Browser plug will let you do is go full screen.

You would scale the layout, or layers.