it’s not clear to the user what happens when you click the ‘max’ button (yours, not the frame buttons in the browser). it creates a new window—maybe users should be “warned” of this. then if you want to go back to the other browser window, you’re told that it was maximized to another window. and it’s not too clear about how to revert to the initial version.
so maybe there should be an ‘unmax’ button on the maximized browser window, which closes that one and re-opens the original one?
or why have this ‘max’ feature at all? why not let users maximize their browser instead of your app? maybe you lose a little real estate, and vyew branding, but it’s more intuitive....