2009
Page Speed – Google Code
by piouPiouMPage Speed is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them.
2005
SitePoint Blogs » Website testing with TestGen4Web and Firefox
by mbertier & 3 others (via)Ran into TestGen4Web today; a Firefox extension (needs 1.5 beta) to help automate testing of web applications, developed by Spikesource, a company making a name for themselves by testing Open Source applications.
1
(2 marks)