Yellowpipe Lynx Viewer Tool

"... displays a Lynx view of a web page via right-click or Tool menu..."

https://addons.mozilla.org/en-US/firefox/addon/1944

Lynx Browser (Text-based) viewer

The Lynx Viewer allows webmasters to see what their pages will look like when viewed with Lynx , a text-mode web browser. It is also presumably, how search engines see your site. In addition to that, it can help determine if web pages are accessible to the vision impaired.

http://www.yellowpipe.com/yis/tools/lynx/lynx_viewer.php