Internet Speed Test от Ray

This extension can be used to measure real-time and average internet connection speed either to the nearest center or a center that is specified by user.

The extension provides a toolbar panel for easy internet measurements. In the settings page you can find a server that is located in a particular region of interest (by default the fastest server gets selected for measurement).

For FAQs please visit:
http://add0n.com/speed-test.html

For bug reports use:
https://github.com/ray-lothian/internet-speed-test/issues