Request to another DNS server if the connection fails with the current

Hello

I would like to ask whether there is an available addon or a feature hidden in Firefox, which allows him to activate try to use other DNS servers if a connection has failed to a server. Lets make an example, would be the best way to explain:

1. I want to connect to Google.com
2 Firefox / Windows prompts for the IP address of the DNS server
3 Firefox attempts to connect to Google but fails (the site had long to answer, for example)
4 Firefox will try another DNS server, that you entered in your Page of DNS IPv4

Or Firefox already do this? Because sometimes it fails to connect to a server when you use a special DNS server. If I change the settings to another DNS server, it works.

Thank you

Please upgrade to version 20.

Tags: Firefox

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