Question: I am using [animate.css](https://daneden.me/animate/) but it don't seem to work in firefox. The code I am using is:

```
       <html>
        <head>
        <link rel="stylesheet" href="animate.css"/>
        </head>
        <body>
        <div class="rotateIn"> content</div>
        </body>
        </html>

```

I want this div to show rotate in effect when we load the page but it don't seem to work.

Answer: 
you have to use `animated` class if you want to show animations try this

```
    <html>
    <head>
    <link rel="stylesheet" href="animate.css"/>
    </head>
    <body>
    <div class="animated rotateIn"> content</div>
    </body>
    </html>

```
Long story short: <http://jsfiddle.net/3ZLLm/>

![enter image description here](https://i.stack.imgur.com/VdGRz.gif)

You **MUST** use the `animated` class provided.

So, to add further, it should be:

```
<div class="animated rotateIn"> content</div>

```