Resolved CGI-count disappeared in FF 29.01

In Fire Fox 29.01, my CGI-counters have disappeared.
I had this problem with FF25 & solved it by removing the adblocker plus add-on but with FF29, I don't have that add-on installed and my counters are gone again.
Does anyone know why? or have another add blocker to use?

 

Here's my code:<p align= "center "><font color= "#ff3300" size= "3 ">
<b>You are visitor number</b></font><b>
<img src= "http://kdsbostons.com/cgi-bin/Count.cgi?df=kdsbostons.com ">
<font face= "Celtic" color= "#ff3300" size= "3 ">
to this site since 03/15/2006</font></b></p>
I tried it in safe mode and the counter shows up fine.
Now I guess I'll have to find out which add-on is causing the problem.

 

That was it. I guess you can't use "Add Block Plus" with a cgi counter.