waypatch
Chrome extension to move rectangular 'patches' of a page backward in time using the Wayback Machine.
Usage
Install the unpacked extension. Open a Wayback Machine page.
Wait a bit (for it to retrieve the page history), and then you should be able to Alt-drag a solid colored rectangle out on the page.
Then normal-drag the rectangle left to pick a date, let go, and that patch will load from the past.