This extension does not collect user information.
It only sends a URL to archive.today in response to user command.
The privacy policy of archive.today (as of this writing): Source IP is not disclosed, "but take in mind that when you archive a page, your IP is being sent to the the website you archive as though you are using a proxy (in X-Forwarded-For header). This feature allows websites (e.g shops or the sites with weather forecast) target your region, not mine."