Firefox Performance Tool. With 86% less hang time, switch quickly between tabs even as you open more. In addition, a couple of videos showcase some of these features.
New Performance Tools in Firefox Developer Edition 40 Mozilla Hacks
Welcome to your new favorite browser. The performance tool gives you insight into your site's general responsiveness, javascript and layout performance. Unblock bottlenecks, streamline processes, optimize assets.
New Performance Tools in Firefox Developer Edition 40 Mozilla Hacks
This makes it easier to collaborate on performance issues, especially in a distributed work environment. The performance tool gives you insight into your site's general responsiveness, javascript and layout performance. The tool then shows you an overview of the things the browser was doing to render your site over the profile, and a graph of the frame rate over the profile. This makes it easier to collaborate on performance issues, especially in a distributed work environment.