User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0 (Beta/Release) Build ID: 20130910160258 Steps to reproduce: Scroll down in an app to the end of the page. Actual results: I had to scroll up again all the page. Expected results: A short-cut to see the top the page automatically.
I think this is a responsibility of the app, not a responsibility of the framework of apps.
Native apps in iPhone have that feature too. I just suggest it as a way to improve the usability of the OS and its apps.
We're already tracking this in bug 874875.