I get this weird bug, that in any other browser, the interval gets called every 10 milisecond, but in firefox, it seems like it doesn’t get called ten times a second as it should!

    setTimeout(function () {
        timerWidth = 0.0;
        if (slideIndex === imageUrls.length - 1) {
            slideIndex = 0;
        } else {
            slideIndex++;
        }

        $("#slideshow-image").css('background-image', 'url("' + imageUrls[slideIndex] + '")');
        $("#slideshow-logo").css('background-image', 'url("' + logoUrls[slideIndex] + '")');
        $("#slideshow-desc > p").text(descriptions[slideIndex]);

        $("#slideshow-logo").fadeIn();
        $("#slideshow-desc > p").fadeIn();
    }, 400)    


setInterval(function () {
        timerWidth += 0.1;
        $('#timer').css('width', timerWidth + "%");
    }, 10)

by ten seconds, the width should be at 100 percent, as it does in other browsers. But in firefox it doesn’t finish in 10 seconds.