If images are missing then check that you aren't blocking images from some domains. You can inspect and manage the permissions for all domains on the <b>about:permissions</b> page via the location bar. There are also extensions (Tools > Add-ons > Extensions) and security software (firewall, anti-virus) that can block images. See also: *http://kb.mozillazine.org/Images_or_animations_do_not_load *https://support.mozilla.org/kb/Images+or+animations+do+not+show