Amazon Kindle Keyboard

Amazon Kindle Keyboard
Release date
July 2010
Operating system
Kindle 3.4
Screen size
600 x 800
Browser viewport
600 x 706
User agent
Mozilla/5.0 (Linux; U; en-US) AppleWebKit/528.5+ (KHTML, like Gecko, Safari/528.5+) Version/4.0 Kindle/3.0 (screen 600x800; rotate)
HTML5 test score
CSS3 test score
Media query support

The E Ink screen of the Kindle has a limited grey-scale range and is slow to refresh so the this is not ideal for dynamic web pages but the browser is very capable and, combined with the "reading mode" that turns a webpage into a linear format with black text on a white background, the browser is more useful that it might seem at first.