Not sure where this should go...

As per subject line...

It installs a button on Googles address bar, click on the button and it runs a Speed Test to the website you're on in a popup window.

If you 'sign up' you can save your results, and it has a 'share' option as well.

Speedtest by Ookla

http://chrome.google.com/webstore/detail/speedtest-by-ookla/pgjjikdiikihdfpoppgaidccahalehjh