Here’s a Screenshot of Google in 2002, Viewed With a Browser from 1991
The image is by Splode.com, and the browser in question is WorldWideWeb (renamed to Nexus later on), created by the web’s original inventor Tim Berners-Lee. Note the menu entry “Style” to the left (which is where the NeXTStep operating system put app menus) – it allowed you to load a user stylesheet to define what the page should look like. At the time, Tim figured it would be up to the specific browser to handle layout, though, so he didn’t formally publish the syntax for the stylesheet language used.