Today I want to announce a new extension for Firefox. It’s been developed by the Mozilla QA Automation Services team, which exists to support the Mozilla QA community by developing tools and frameworks for ease of testing. And this time, in case of the extension, we even target (web) developers, and our huge Firefox user base. So what is it about? Mid of December 2011 bug 711900 has been filed. It complained about an increased garbage and cycle collector activity in Firefox 10, which was not existent in Firefox 9.