Just closing the tab isn't enough to release that memory though. Lets say you have 200 tabs open, check your computers memory usage, close all of the tabs but

Just closing the tab isn't enough to release that memory though. Lets say you have 200 tabs open, check your computers memory usage, close all of the tabs but one and see how much your memory usage drops. Then close that last tab (or fully quit the program on a mac), and see how much memory you get back. I typically get about 1/4-1/2 of my total RAM back after closing the program entirely.