伪码：

wait until the end of the image (when it is about to loop)
create a canvas element that has a static version of the gif as currently displayed drawn on it
hide gif
display canvas element in a way that makes it look like the gif froze

JavaScript：

var c = $("canvas")[0];
var w = c.width;
var h = c.height;
var img = $("img")[0];
setTimeout(function () {
    c.getContext('2d').drawImage(img, 0, 0, w, h);
    $(img).hide();
    $(c).show();
},10000);

jsfiddle