Reset - press & hold the 'Power' and 'Home' buttons simultaneously until the Apple logo appears - this may take a longer time, so have patience; the iPad will 're-boot' - NOTE that none of these maneuvers will alter your apps, files, or settings.
If I get this right, Safari stopped crashing on your iPad 4, but can't load certain websites? Take a look at Settings - Safari - Block Cookies.Hellow friends, I want to ask why my browse suddenly stop when I surfing on some sites.?.tks.