Kristian, Good idea; your post title alone made me remember Prism, which I haven't used for anything in forever. For a post more likely to get upvotes on HN, I

Kristian, Good idea; your post title alone made me remember Prism, which I haven't used for anything in forever. For a post more likely to get upvotes on HN, I recommend making a more how-to style post than just an idea post. While I know what Prism is, many may not, and even I don't know how you would accomplish what you're suggesting using Chrome (mentioned in your post), so linking to information on doing these things would be very helpful.