Scaling the game for different devices. What's wrong with android?

Question

Android

I write toys in HTML5 of a fixed size for desktop and mobile platforms. The fact that the zoom property is not defined in Firefox in CSS does not really bother me now. I'm worried about why screen sizes are determined correctly in desktop chrome, but not in mobile ... $(window).height() gives the hell out of it, window.screen.availHeight is already better, but still does not save the day . Please look at my script and tell me what I'm doing wrong.

$(document).ready(function() {
  function applyScale() {
    var scaleFactor = 1, scaleFactorX = 1, scaleFactorY = 1;
    var width, height;

    // why adnroid is so strange?
    if (isAndroid()) {
      var width = window.screen && window.screen.availHeight || $(window).width();
      var height = window.height && window.screen.availWidth || $(window).height();
    } else {
      var width = $(window).width();
      var height = $(window).height();
    }

    if (width < 1450) {
      scaleFactorX = width / 1450;
    }

    if (height < 1024) {
      scaleFactorY = height / 1024;
    }

    scaleFactor = scaleFactorX < scaleFactorY ? scaleFactorX : scaleFactorY;

    if (scaleFactor < 0.1) {
      scaleFactor = 0.1;
    }

    $('body').css('zoom', scaleFactor);
  }

  $(window).resize(function() {
    applyScale();
  });

  applyScale();
});