http://www.ehow.com/how_11385212_troubleshoot-reset-connection-firefox.html https://support.mozilla.org/en-US/kb/server-not-found-connection-problem https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message '''http://kb.mozillazine.org/Error_loading_websites''' '''This Connection is Untrusted''' is sometimes caused because the computer system clock is wrong. Check the time / date / time zone settings.

If images are missing then check that you do not block images from some domains. You can tap the Alt key or press F10 to show the Menu Bar Check the permissions for the domain in the currently selected tab in "Tools > Page Info > Permissions" Check "Tools > Page Info > Media" for blocked images *Select the first image link and use the cursor Down key to scroll through the list. *If an image in the list is grayed and "<i>Block Images from...</i>" has a checkmark then remove this checkmark to unblock images from this domain. Make sure that you do not block (third-party) images, the <b>permissions.default.image</b> pref on the <b>about:config</b> page should be 1. Make sure that you haven't enabled a High Contrast theme in the Windows/Mac Accessibility settings. Make sure that you allow pages to choose their own colors. *Tools > Options > Content : Fonts & Colors > Colors : "Override the colors specified by the page with my selections above" Try "Never" if the default "Only with High Contrast themes" isn't working. This setting affects background images. ---- There are extensions like Adblock Plus (Firefox menu button/Tools > Add-ons > Extensions) and Anti-Virus software that can block images and other content. See also: *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes *http://kb.mozillazine.org/Images_or_animations_do_not_load *http://kb.mozillazine.org/Websites_look_wrong