A team rebuilt the original WorldWideWeb application
inside modern browsers. Here is a thing I never knew about WorldWideWeb:
HTML editing and URLs weren't intended for the user. All the editing would be done in the rendered view. Styled directly in the browser (from a custom toolbar) and saved to networked drives (possibly pushed using FTP to other networks).
Imagine if development had continued along this conceptual branch, and everyone developed the regular habit of copying and editing any web page?
Also of note:
Although a large portion of the code is dedicated to the UI for the WorldWideWeb browser and also the NeXT operating system, the WebView - as we called the rendering logic - contains hacks that were only achievable using good old tried and tested DOM scripting.