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rjohara - 6:12 pm on Aug 22, 2005 (gmt 0)
Here's a way to make the web a better place: the folks working on Firefox/Mozilla should create a simple button on the browser toolbar that says "Show me an outline of this page." When you click it, the page collapses to just titles, headers, and the first line of each paragraph. That would let you get a quick view of a page's contents. (You can actually set up your own user stylesheet that will do something close to this: just set all elements except <H> to display:none and see what happens when you apply the stylesheet.)
Encyclo is right - the semantic data extractor is a very valuable tool, both for learning and for proofreading, and should be more widely known. It's one of my favorites.