I have tried 3 of them. Firefox, Flock and Safari. All seem to crash after 3 minutes or so but can last up to 10. It started happening when i was watching some videos on Youtube and then when i went to go and watch another it wouldnt load it up. And since then i have came across this problem. I tried phoning Apple but at £35 just to fix this seems a bit steep So does anyone have any ideas?