Here got some information about this issue :
The content is :
To help distribute the load across our servers, the DreamHost web panel loads its images from a separate web server. Some web browsers like Firefox interpret this as a sneaky advertising technique. In our case, that's not the case!
If you're not seeing images on your account control panel, or are experiencing other display problems, try this fix for Firefox.
Under the "Tools" menu select "Options."
Click "Web Features."
You'll need to add our web panel to your 'exceptions' list. To do this, click the 'Exceptions' button to the right of "Load Images."
Add secure.newdream.net to your ALLOW list.
That should do it!
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