Yep. I went to Paypal and they had a tool which let you create the code for a DONATE button; so that is done.
You seem to know a lot about using the WebChromeClient.
I had seen a page about 2 days ago which detailed how to back-up in the web history when someone hits their phone's KEYCODES_BACK button. Then, once the history has played-out, let the normal back button work; but I lost it.
Do you know how that would be done, or can you find that page?