Browser sometimes crash and gives you a hard time in the middle of a task.
For me, its Google Chrome because I'm using it most of the time and its fast rather than other web browser...
if i were to rate those browsers, for me my no.1 is Google Chrome, no.2 Mozilla Firefox, no.3 Internet Explorer and last is Opera (no.4). i'm not yet experience to used an Opera browser so its last on my list.
cause it runs faster
but i also use firefox