Q: Uploadify doesn't work in forefox and safari All good in chrome, ie and opera. But in FF and Safari this plugin don't work(
Even the link does not turn into a button.
This is my code:
$(document).ready(function () {
    $("#uploadify").uploadify({
        acync: true,
        folder: 'Uploads/',
        swf: '/Scripts/uploadify/uploadify.swf',
        uploader: '@Url.Action("UploadFotos", "Fotos", new { id = ViewData.Model.Id})',
        fileExt: "*.jpg,*jpeg",
        fileSizeLimit: '2MB',
        onUploadSuccess: function (file, data, response) {
            var d = JSON.parse(data);
            if (d.success == false) {
                alert("У вас не хватает прав для этого действия");
            } else {
            $("#fotos-container").append("<div class='foto' id='" + d.id + "'></div>");
            $("div#" + d.id).append("<img src='/uploads/thumbs/" + d.name + "' />");
            $("div#" + d.id).append("<input type='checkbox' onclick='ToogleMain(" + d.id + ")'/> Главное фото <br />");
            $("div#" + d.id).append("<a href='#' onclick='deletefoto(this" + d.id + ")'> Удалить </a>");
        }

        }
    });
});

UPD:
Problem is solved! It was necessary to install flash player for browsers.
