Comment by quotemstr

> User-style-sheets sound great in theory, but CSS is Cascading Style Sheets which means it would be very easy for users to break functionality of web-sites. For instance make the cascade cascade so that the text-color is same as background color on some widget on some website and you might be missing a button.

Pretty sure AI-driven style derivation will finally deliver the dream of custom stylesheets in a robust and automatic way.