I recently downloaded Firefox to replace Safari because there were problems downloading images on websites on a fairly routine basis. In doing so, I noticed a loud fan from the MBP (2011 version) while watching videos, something I never dealt with when using Safari. Is there a reason to this or a possible solution? It's a very noticeable and increasingly obnoxious roar. I used the 'Search' feature on this website but didn't find anything that related to this problem.