Stripe's Payment Request Button uses the cross-browser Payment Request API from W3C.
Chrome doesn't let me "inspect" the HTML of the elements of the modal, so I'm not sure how to write compatible commands in the form of $browser->click('.selector');.
@jlrdw Interesting. Browserstack lets you write tests that click the right buttons on these popups? What would the selector look like for this example?
I searched the website for a while and was having a really hard time finding the right documentation.