The new version is slow to open programs from a fresh reboot on Windows XP. I had the issue with Avast 2014 on first install. The program update notification said that Adobe Air was out of date so I got the latest version of that. I also ran CC Cleaner, and did 2-3 more restarts. The programs open a little longer than when I had MSE as my Anti-Virus, but going to MS Config and disabling Adobe Air at start up created a much faster boot time for Avast.

Firefox on bootup could open maybe five seconds faster than it does. On subsequent sessions following the bootup, it is only about three seconds slower. You guys can also send Help and Feedback to Mozilla Firefox about this issue in the Help section of the browser. That might help.

Jack