The Extension cannot be submitted to the chrome app store yet as the "request" scope is not approved by uber yet. So to use you must either be whitelisted in the apps control panel (get in touch ) or have an uber developer account
Download latest build of the extension
Once you have downloaded and unzipped the extension load into chrome by following these instructions.
chrome://extensionsin your browser (or open up the Chrome menu by clicking the icon to the far right of the Omnibox: and select Extensions under the Tools menu to get to the same place).
Ensure that the Developer mode checkbox in the top right-hand corner is checked.
Click Load unpacked extension… to pop up a file-selection dialog.
Navigate to the directory in which your extension files live, and select it.
You are now ready to use the extension via your browser bar.