You can download the Rocker Gestures extension from Chrome Web Store. No more left/right arrows for you!

Rocker gestures are a series of clicks (down, right, left, or up) that you can make with your hand to move the current tab in a web browser. It was designed to be as easy to use as a keyboard. No need to keep your hands on the keyboard at all times! This extension lets you do just that. You will not need to write any code or make any changes in your websites.

The Rocker Gestures extension can be used for any websites, provided they support it. 

This extension does not require any permissions except for the usual Web activity ones. This means that you won't need to change your privacy settings or permissions for your favorite sites.