So this is my problem...If you have any suggestions I would love to hear them. Thank you in advance. A few times a day Firefox (Safari does the exact same thing) drains a hundred percent of my CPU (as stated on my activity monitor) which causes my whole macbook to slow down and my fan to go crazy. This last from a few minutes to 10 minutes or more. Originally i thought that it had something to do with the number of tabs that i have open (which sometimes is over 20 or 30) but then i noticed that this happens even if i have only 3 or 4 tabs open. Do you have any ideas? thank so you so much!