This is what I've been looking for for a very long time. I've long liked Safari's ability to save a page as a Webarchive file, but didn't like that it was a proprietary format. Saving via Firefox was okay, but clunky with the way it saves all the files and graphics separately. SingleFile is great, saving everything as a single HTML file. What is this magic where they can include the graphics invisibly in the file? I can still edit the HTML to remove undesirable stuff without breaking the saved file. This extension is so incredibly useful that I hope it's never abandoned.