Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
It also updates the list of links to include recent additions to the forum, such as the Windows 8 forum and the Library of Knowledge. Lastly, it adds a "copy link" section for easy access to links helpers frequently find themselves pointing members to, currently the SysInfo utility and the Malware removal instructions.
Note: If you are unable to find the button for the extension, look in the gallery under View -> Toolbars -> Customize.