Just place mouse over appearing link or scroll icon, and the thing happens! Browsing web doesn't have to be as physical an exercise as what you are used to.

Click-free Browsing adds fixed navigation icons to the right edge of a web page. By hovering mouse over an icon you can easily scroll the page, or go backward or forward in page history. But it can become more intuitive than that: take mouse to the top, bottom or left edge of a page, and an appropriate browsing icon will appear leading you to the right place. Following a link, in turn, equals to mousing an icon next to a link, and the link will be clicked for you. Switching between tabs can also happen click-free.

By default Click-free Browsing is active only on regular http pages - just to make sure no unintended actions take place on secure https sites. But you can change that behavior as you wish.