Tabmix is reported at Slow Performing Add-ons https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox The result from my test is 6%, can you retest Tabmix and let me know what is your result? Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0a1) Gecko/20110917 Firefox/9.0a1 new profile with about:startup extension main sessionRestored firstPaint version appBuildID 59.38 791.75 731.25 9.0a1 20110917030857 62 797 703 9.0a1 20110917030857 62 750 703 9.0a1 20110917030857 46 749 703 9.0a1 20110917030857 63 766 719 9.0a1 20110917030857 62 750 687 9.0a1 20110917030857 47 750 687 9.0a1 20110917030857 63 766 719 9.0a1 20110917030857 63 750 719 9.0a1 20110917030857 63 797 750 9.0a1 20110917030857 62 843 812 9.0a1 20110917030857 46 905 781 9.0a1 20110917030857 62 828 765 9.0a1 20110917030857 62 827 765 9.0a1 20110917030857 78 843 765 9.0a1 20110917030857 62 781 703 9.0a1 20110917030857 47 766 719 9.0a1 20110917030857 new profile with about:startup + TabmixPlus 0.3.8.6 extensions main sessionRestored firstPaint version appBuildID 54.06 835.94 802.06 9.0a1 20110917030857 47 859 828 9.0a1 20110917030857 93 890 843 9.0a1 20110917030857 46 827 796 9.0a1 20110917030857 78 828 797 9.0a1 20110917030857 47 890 843 9.0a1 20110917030857 47 812 781 9.0a1 20110917030857 47 812 781 9.0a1 20110917030857 47 828 812 9.0a1 20110917030857 63 828 781 9.0a1 20110917030857 46 827 796 9.0a1 20110917030857 47 797 766 9.0a1 20110917030857 62 843 812 9.0a1 20110917030857 62 781 750 9.0a1 20110917030857 47 828 781 9.0a1 20110917030857 46 796 765 9.0a1 20110917030857 47 828 797 9.0a1 20110917030857 47 937 906 9.0a1 20110917030857

tab-mix-plus https://addons.mozilla.org/en-US/firefox/addon/tab-mix-plus/versions/0.3.8.6 https://addons.mozilla.org/en-US/firefox/addon/tab-mix-plus/versions/0.3.8.7pre.110917a

onemen, have you tried this with no network connection? I just remembered that this is a difference between what you would normally test on your desktop and what we do in the performance test servers. If you have any synchronous requests in your startup process, that could explain the reported difference.

we have stopped working on the addons perf testing using talos.