title: Removing image alt text with black borders in firefox?
body: <p>When i open my site in firefox it shows img alt attribute in a black box(see attached image).
  it only shows just for a second and when image starts loading its gone.</p>
  
  <p>i want to remove this.</p>
  
  <p><img src="https://i.stack.imgur.com/0xHjx.png" alt="enter image description here"></p>
  
  <p>this is my html code</p>
  
  <pre><code>&lt;a href="url"&gt;&lt;img alt="alt text" width="650" height="241" src="src url" /&gt;&lt;/a&gt;
  </code></pre>
  
  <p>it only shows in firefox.</p>
  
  <p>i have tried using  this css code</p>
  
  <pre><code>a img {
      border: 0;
  }
  </code></pre>
  
  <p>but this did not help.</p>
  
  <p>how i can remove this?</p>