trigger phrase: How has this page changed recently?

action: Use the wayback machine or similar to report things like when the current webpage last changed, and if possible, what changed about it.

--- There is a **[$10 open bounty](https://www.bountysource.com/issues/23594828-contextscript-request-how-has-this-page-changed-recently?utm_campaign=plugin&utm_content=tracker%2F10434650&utm_medium=issues&utm_source=github)** on this issue. Add to the bounty at [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F10434650&utm_medium=issues&utm_source=github).