easyList scheint ein Zertifikat von StartCom zu benutzen (siehst du bei Zertifikat anzeigen).
Zitat von
http://cert.startcom.org/:
The StartCom Certification Authority is today supported by most important platforms like Microsoft Windows, Apple Macintosh
OS X and many Linux operating systems and browsers like Internet Explorer, Mozilla Firefox, Safari and Google's Chrome provide built-in support. Should you be using an older or unsupported browser you may
import our CA certificate.