# Unable to connect

An error occurred during a connection to pixel.rubiconproject.com.

What can you do about it?

- The site could be temporarily unavailable or too busy. Try again in a few moments.
- If you are unable to load any pages, check your computer’s network connection.
- If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.

Learn more…

You can continue with your default DNS resolver. However, a third-party might be able to see what websites you visit.

Learn more…

You can continue with your default DNS resolver. However, a third-party might be able to see what websites you visit.

Learn more…

It looks like your network security settings might be causing this. Do you want the default settings to be restored?

View Certificate

Report errors like this to help Mozilla identify and block malicious sites