yes we can customize ...
ioS only.
- closebuttoncaption - set to a string that will be the caption for the "Done" button. Note that you will have to localize this value yourself.
- toolbar - set to 'yes' or 'no' to turn the toolbar on or off for the InAppBrowser (defaults to 'yes')
But here you can not change the position of the status bar and done button.