Aleksander -- if I understand what you are asking, I think what you are looking for is the inAppBrowser plugin. Please read the documentation for that plugin in order to understand all the options available with it.
I will be looking for this plugin. I analized Demo project available in XDK system to make my idea possible. When it is in emulate state its working well. Inserting some functions and the idea from this project to my one it is not working as I hoped.
Thank you very much.
hm... I found what you are focused to me. I mean using window.open(...). I included already this tool at the first shape of my app. But when I touch/click e.g button in app, www browser installed in phone using as test platform, is opening. I thought this plugin works creating its own window in android app to show www content. And it is independent to www phone installed browser.
Some help more please.
Do not use window.open() to open your pages, use the inAppBrowser's API. See the README.md file on that plugin's github repo for the details. You will then have many options and more control over how your page opens.