Based on the little-used HTML5 outline spec, investigate&implement an in-browser tool (currently a chrome extension or browser user script) to easily, interactively scrap a documentation web page into an 'index-content' map for (offline) searching.

Motivated by the fact that most scrappers today are command line tools, too tech-savvy.

Currently only target documentation web pages, which are much better structured and so easier to scrap. Also I think these pages benefit most from indexing&scraping.