When I try installing it off the eff website, I get this message in Chrome: "Apps, extensions, and user scripts cannot be added from this website." No option to override or ignore the message :-/
You have to download the extension file and drag it into your extensions list.
You need to download the extension, open the extensions settings, then drag the .crx file into there.
Absolutely annoying this ability to override messages. The same issue is with expired/not authorized server certificates on Chrome. I need to copy session ids around just to trick Chrome into accessing some stupid research database. I hate nanny browsers.