At this moment, I had Safari open since I first booted the machine (2011 MBAir). Only one tab (facebook) currently, the lateral bar with news and so on, etc. I understand that newer versions of OS X eat as much RAM as they can, in order to cache files and apps. We only have a RAM-starved Mac when the swap file size grows to much more than 1 GB. After using Chrome since forever, Safari has won me over. Just like most Apple software, I find it to be extremely slick and better than the competition (better battery life, snappier, gestures work better, looks better, better functionality for me (reader mode, reading list, newsfeed, etc.) but, just like most Apple Software, some issues appear that makes me believe that it is time to make all built-in Apps have a place on the MAS and take their sweet time between OS releases, like 2 years or more. But focussing on Safari (the most up-to-date version, with Java and Flash), am I witnessing a huge memory leak (safari.app)? What about Facebook eating more than 300 MB of RAM? Is it all cache from endless scrolling? p.s: Does it correctly sync favicons from youtube?