deplee, again, you're clouding the issue. In a previous post, I asked whether you're talking about text/font size in your browser, or the browser window. You said you were talking about window size. But, as Allan said, you can not have greater than 100% window size. In other words, if your browser window is maximized, it is using 100% of your monitor/screen space. Obviously, your window size can not exceed your monitor/screen size, or 100%.
On the other hand, text size that you see in your browser window can be varied, and can be greater than the normal size.
And, I ask again, do you know how your Maximize button works?