Agreed about making that the default. Another workable approach are keeping a full history graph, and only showing visited links on the site where you original

Agreed about making that the default. Another workable approach are keeping a full history graph, and only showing visited links on the site where you originally clicked on them. Or, the browser could highlight visited links in a way that can't be detected with JavaScript code. This isn't hard to fix, so obviously we just haven't been complaining loud enough.