Note: Pre-built environments can make setting up your website very easy because they reduce the configuration, but the available options may limit you to an unfamiliar server or other components and may be based on an older version of the OS. Once you've discovered a bug, you need to try to fix it. Browsers are much better at following standards these days, but differences and bugs still creep through sometimes. System is offline. A good description of this file can be found at mozillazine.
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