Where is the URL pushed in "Push URL"?

Will it be pushed into the Native browser or into Chrome (if it's installed)? Either way, can I tell it to use Private mode?

Hi lwc,
You can enter the URL you need here and it will be opened on your device:

Dear admin, please re-read my question. I asked in which browser will it be open if my device has more than one.
I also asked if I can tell it to use Private mode.