Send the current URL to another web service.
This is a simple extension that takes a URL and POSTs it to a web service of the user's choice. Multiple services can be defined, and can be launched via the extension button (using the current tab's URL) or via a context menu on all links (using the link URL).
This was written as part of a MythTV extension to make it easier to view NetFlix, YouTube, and other video services on a Myth frontend by using a laptop to navigate the site, then using this extension to easily throw the URL of the desired content to the Myth box.
It may or may not be useful to anyone else. :-)