Firstly, let's reduce all controls in the mobile browser to one single button—like the iPhone did to the mobile keyboard—and have it be the central access point to all controls; from the url input to tabs and sharing.
Secondly, let's give websites a solution to manage and distribute announcements without them becoming a nuisance on screen.
Third and lastly, on websites that take proper advantage of the heading system, let's incorporate the headings into the scroll bar. This so that I can scroll up to a specific section of the website without having to keep going all the way to the top.