(Solved)Difference between blocked answer?

[periko]

Hi.
Here continue my learning curve.

Using pfsense 2.4.4_p2 pfblockerNG-devel 2.2.5_21.

Why sometimes I get the default blocked message inside the browser window and other I get the 1x1 icon black screen?

Thanks.

[RonpfS]

DNSBL http server return different response to the browser depending on what is in the URL : 1x1gif for picture, Javascript or the Blocked page when there is only the domain name in the URL : http://example.com/