RightLynx, a Firefox extension, displays a Lynx view of a web page via right-click, toolbar button or Tool menu. With just one click and without leaving the page (RightLynx opens in a new, small window), preview the page you are on with a Lynx Viewer. You can see what what a page will look like when viewed with Lynx, a text-mode web browser.

It is also presumably, how search engines see your site.

In addition, it can help determine if web pages are accessible to the vision impaired