A Chrome Extension
This extension allows your to navigate through a webpage using your keyboard instead of a touchpad or mouse. You can select and move through text, move the cursor one word at a time and select blocks of text using keyboard shortcuts.
When you are on the page you would like to navigate using this extension, press F7 on your keyboard and turn on caret browsing.
You will now be able to scroll through your site using the arrow keys on your keyboard.