This is what mine looks like (since I blocked the whole domain in my hosts file):
Unable to connect
An error occurred during a connection to www.reddit.com.
<span style="color:#323232;">The site could be temporarily unavailable or too busy. Try again in a few moments.
</span><span style="color:#323232;">If you are unable to load any pages, check your computer’s network connection.
</span><span style="color:#323232;">If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.
</span>