Chrome (maybe Safari?) fires "blur" twice on input fields when browser loses focus

The reason it is firing twice is because of window.onblur. The window blurring triggers a blur event on all elements in that window as part of the way javascript's capturing/bubbling process. All you need to do is test the event target for being the window.

var blurCount = 0;
var isTargetWindow = false;
$(window).blur(function(e){
    console.log(e.target);
    isTargetWindow = true;
});
$(window).focus(function(){
    isTargetWindow = false;
});
$('input').blur(function(e) {
    if(!isTargetWindow){         
       $('div').text(++blurCount + ' blurs');
    }
    console.log(e.target);
});

​ http://jsfiddle.net/pDYsM/4/

This is confirmed Chrome bug. See the Chromium Issue Tracker

The workaround is in the accepted answer.

Skip 2nd blur:

var secondBlur = false;
this.onblur = function(){
    if(secondBlur)return;
    secondBlur = true;
    //do whatever
}
this.onfocus = function(){
    secondBlur = false;    
    //do whatever
}