Mozilla firefox takes so much of time to start. here is a easy solution.
1. start firefox
2. start task manager
3. go to process and
4. then to firefox process in the processes tab.
5. right click and set the pririty to high.
6. and then close the firefox and start it again you will see the difference.
only problem is you have to do it every time you start your computer.
you can do this to any other program as well.