Websites randomly don't load

This article is about Firefox/Mozilla Suite randomly having problems connecting to or loading websites. If Firefox/Mozilla Suite has problems loading any website, read Error loading any website. If Firefox/Mozilla Suite can successfully load some websites but not others, read Error loading some websites.

• The site may be down or experiencing difficulties, try loading the site from another computer or browser to see if this is the case.
• If you enabled network.http.pipelining (a "tweak" designed to improve page loading time), disable it in about:config by typing "pipelining" in the filter and right-clicking all entries and choosing Reset. (If you set this preference by editing the "user.js" file, remove this edit.)
• You may have problems with your domain name service (DNS).
• Try disabling IPv6.
• Perform step 5 of the standard diagnostic to determine if an extension is the cause of your problems.

Still experiencing problems

• If the previous points didn't help or don't apply, try the suggestions in Error loading any website and Error loading some websites.
• Perform the Standard diagnostic