Firefox extension adding a notification icon for pages with
`rel=vcs-*` tags.  See the [specs][] for details on the format.

When the icon is "hot", you can click on it to pop up a list of
rel-vcs links.  Clicking on an item in the list will open that URI in
a new tab.  Since Firefox can't speak `git://` etc., the new tab will
mostly be useful as a source of the URI for copy/pasting into a `git
clone ...` call or similar.  Alternatively, you can consider the "hot"
icon as a suggestion to use `webcheckout` or other `rel=vcs-*`
consumer on the source page.

This plugin was initially based on the source for the [Semantic
Radar][SR] plugin.

[specs]: http://kitenet.net/~joey/rfc/rel-vcs/
[SR]: http://sioc-project.org/firefox