I don't get a problem browsing ebay uk. See the image.

Try running Firefox in Diagnose Firefox issues using Troubleshoot Mode. If it functions properly in that configuration, then one of your add-ons is the culprit.

If images are missing then check that you aren't blocking images from some domains.
See:

• http://kb.mozillazine.org/Images_or_animations_do_not_load

• Check the permissions for the domain in the current tab in Tools > Page Info > Permissions
• Check that images are enabled: Tools > Options > Content: [X] Load images automatically
• Check the exceptions in Tools > Options > Content: Load Images > Exceptions
• Check the "Tools > Page Info > Media" tab for blocked images (scroll through all the images)

Sortlike issue here, I dont get it with Ebay but try to run a corporate site. Partly https, partly http. This doesnt work out for Firefox because I cant show the page with mixed content enabled. Isnt there a checkbox where I can enable this, like with IE?