Hey guys newbie here but have been trolling about this topic for a bit. I have 2 questions. I have a mid 2010 MBP and run lots of tabs and windows inside my firefox, which is exactly what shows up as being a memory hog. Which I suspect is why I get lag, and the spinning death ball First question is do I need more memory? or am I simply running too many Tab Groups. I use the Firefox's Panorama/Tab Groups feature where you can create multiple mini windows, with lots of tabs in them, within one browser. I generally have approx 4-5 of groups with 7-15 tabs in each. Secondly, should I be nervous about adding 3rd party memory? Been reading stuff about "Kernal jumps" and other snafus after adding memory and it is scaring me to perhaps think more about Apples insanely priced OEM memory. Which I absolutely cannot afford Thoughts..