I was asked recently how can you make sure that Diginotar breach will not compromise your security.
It’s simple stop trusting them, to do that in firefox :
Go to Options/Preferences:
![options dialog](http://www.mobygeek.net/blog/wp-content/uploads/2011/09/options-300x296.jpg)
Click on View Certificates
![certificates list](http://www.mobygeek.net/blog/wp-content/uploads/2011/09/certs-300x206.jpg)
Find Diginotar certificate , select it and click Delete or Distrust…
![confirm](http://www.mobygeek.net/blog/wp-content/uploads/2011/09/confirm-300x140.jpg)
Confirm with OK