A look at the Mozilla-based One Laptop per Child web browser
The One Laptop per Child (OLPC) project is in the final steps to finally ship the first laptops to poor children living in poor countries.
XO, as the laptops are officially named, use a Fedora Core 7 based operating system with a user interface dubbed Sugar that provides a simple desktop environment to access the bundled applications including: a Gecko-based web browser, an Abiword based word processor, a web feed aggregator, a Tetris clone, a paint application, a Logo implementation, a video/photo capture application to use with the included web cam, a simple music composition tool and a calculator.
The Gecko-based browser is as simple as it gets and then a little bit simpler. As you can see from the screenshot below it provides back, forward and stop/reload buttons and a location bar that also acts as a progress bar while content is loading.