The Certification Authority (CA) certificate owned by e-Guven Elektronik Bilgi Guvenligi A.S. will be removed in Firefox 38 due to insufficient and outdated audits. Mozilla products ship a default list of CA certificates, which may change with each security patch or new version of the product. The integrity of the secure Web depends on CAs issuing certificates that correctly attest to the identity of websites. Mozillas CA Certificate Inclusion Policy requires CAs to annually provide public-facing attestation from an independent party stating that they have audited the CA using one of the following two sets of criteria:”]
Source: https://blog.mozilla.org/security/2015/04/27/removing-e-guven-ca-certificate/