Your browser displays "The document contains no data" error message? This article contains possible solutions to this problem.
Make sure your firewall or antivirus software aren't blocking Firefox from accessing the web.
This may be because of your proxy server, try disabling it if you can.
This could be due to a problem with the cache. Clear your cache:
Firefox: "Tools -> Options -> Privacy -> Cache".
Mozilla Suite: "Edit -> Preferences -> Advanced -> Cache".
Software known to cause problems:
Peer Guardian, try switching it off or use an alternative product.
Older versions of Panda Antivirus may be causing this. This is how to fix it (http://www.pandasoftware.com/support...508&IdIdioma=2
If you are still experiencing problems, check that you can access the website in other browsers. If you can't, it's probably a server problem.
If this happens occasionally and you just want to get rid of annoying popup, turn on error pages (details in the link below).
To stop this pop-up message, and display the error on the page itself:
a. Type about
:config in the location bar
b. Look for the line browser.xul.error_pages.enabled
c. Change its value to true
If this message appears always, make sure your firewall isn't blocking Firefox from accessing the internet.
If this happens occasionally:
To prevent the annoying pop-up from appearing follow the instructions at the top of this post.
Older versions of the Panda Antivirus often cause this problem; read how to fix.
Peer Guardian might be the problem; remove it and use an alternative product.