Problems with layout in the Mozilla browser, how to fix it?

Question

css

There is a site made on Joomla 3.15. When I open it in Google Chrome browser (latest version) and Internet Explorer 11 browser - everything is fine, screenshot below:

But in Mozilla Firefox 32.0 browser everything is bad:

Why is this happening? How can this be fixed?
The image has the following css properties:

display: block;
margin-left: auto;
margin-right: auto;

Answer 1

Already solved the issue by adding the CSS property clear: both; to the picture!

Answer 2

All the code you gave will not help in any way. Link to the site please!