Live capture vs a frozen map: two honest ways to record a scrolling page

This is the second post in a series about auto-scroll capture in a Chrome extension. The first post was the problem. This one is the fork I had to make: film the live tab, or render motion from a still image of the page. They look similar in the UI. They are not the same product. The same intent, two physics I wanted a recording that moved down a site without my hand on the wheel. That sentence…