icons not showing up in firefox without "www." before domain - firefox

Question

I'm using OpenCart for my site. The icons fail to appear when you visit example.com but they do appear if you visit www.example.com.
Any ideas what is going on here?
I have just edited config.php file and removed www. and it works for naked domain but the icons do not load
// HTTP
define('HTTP_SERVER', 'http://example.com');
define('HTTP_CATALOG', 'http://example.com');
define('HTTP_IMAGE', 'http://example.com/image');
define('HTTP_ADMIN', 'http://example.com/admin');

Answer 1

I would redirect all non www traffic to www. This should take care of your issue with icons. It'll also prevent possible SEO issues as a result of duplicate content/pages.
If you have an apache server add a redirect to your .htaccess.
RewriteEngine On
RewriteCond %{HTTP_HOST} ^example.com
RewriteRule (.*) http://www.example.com/$1 [R=301,L]

Answer 2

What worked for me:
Go into the config.php file (please backup your file first) in the main directory of your OpenCart installation.
Under //HTTP (lines 5-8 for me), edit
lines:
define('HTTP_SERVER', 'http://example.com/shop/');
define('HTTP_CATALOG', 'http://example.com/shop/');
define('HTTP_IMAGE', 'http://example.com/shop/image/');
define('HTTP_ADMIN', 'http://example.com/shop/admin/');
to read:
define('HTTP_SERVER', '/shop/');
define('HTTP_CATALOG', '/shop/');
define('HTTP_IMAGE', '/shop/image/');
define('HTTP_ADMIN', '/shop/admin/');
.
Depending on your installation, I'm sure this could cause some problem somewhere I just haven't found it... yet... (maybe someone else could correct me -- I really don't mind; I like to learn).

Answer 3

This worked for me:
Add to .htaccess file this line: Header add Access-Control-Allow-Origin "your-domain.com"
Change "your-domain.com" required by the url.
If in our configuration file use: define ('HTTP_SERVER' 'http://example.com/);
Then place: Header add Access-Control-Allow-Origin "http://www.example.com/"
I tested this in opencart 2.0.