When ever I open Firefox after I bootup my mbp, it takes a while before it actually opens. The Firefox icon in the dock has the "white orb" below it, so it is open, but it takes maybe a inute for firefox to actually appear on the screen. I'm also seeing at times, it takes more than 2 mins for the entire computer to shutdown. All windows close and the rainbow beach umbrella appears for a while and the computer then shuts down. I'm not sure if the two are related. Any suggestions?