Web pages often contain many small images and scripts that remain invisible until the user interacts with the page. To speed up browsing, the browser won’t download them until the user does something to necessitate it.
Until now, Perpetually has followed the same rule: Only archive the resources necessary to make the initial page render perfectly. But starting in today, our archiving engine now predicts user actions that will trigger additional downloads and archives that content as well. For example, an image or slideshow that appears when the mouse is over it will now simply work without customization. This improvement is what Perpetually is all about — perfectly capturing the page so that it can be fully used in the future.