Well, doing UI work right now as well, it is quite interesting what bugs cause the performance regression. Take the OS-titlebar-issue. I can really easily imag

Well, doing UI work right now as well, it is quite interesting what bugs cause the performance regression. Take the OS-titlebar-issue. I can really easily imagine how much time and nerves it took to find this one. Apart from that, it is just a nice insight how they benchmarked and solved an issue. It is good to see that Mozilla is doing that properly, especially given how much Chrome kicked FFs ass in the early days.