OpenGov Button
essentially a play on the open access button, repurposed for open government, open government data, accountability, transparency, data journalism, lobbying, etc.
chrome extension
example created from this tutorial: http://www.sitepoint.com/create-chrome-extension-10-minutes-flat/
manifest.json, and a 19x19 icon is required
popup.html, and popup.js are not required in name or functionality, but cannot think of a situation where you are not going to need some flavor of each to create an extension with similar functionality.
for testing, open up chrome://extensions/ and select "Developer mode" input checkbox
then select "Load unpackaged extension..."
then navigate to the extensions directory, select and upload
Getting Started
https://developer.chrome.com/extensions/devguide
https://developer.chrome.com/extensions/overview
https://developer.chrome.com/extensions/tut_debugging
https://developer.chrome.com/extensions/api_index