Bug 1624464 - don't load certificate transparency log keys if CT is disabled r=kjacobs

Differential Revision: https://phabricator.services.mozilla.com/D68285

--HG--
extra : moz-landing-system : lando

security/certverifier/CertVerifier.cpp

@@ -250,6 +250,9 @@ static Result BuildCertChainForOneKeyUsage(
 }
 
 void CertVerifier::LoadKnownCTLogs() {
+  if (mCTMode == CertificateTransparencyMode::Disabled) {
+    return;
+  }
   mCTVerifier = MakeUnique<MultiLogCTVerifier>();
   for (const CTLogInfo& log : kCTLogList) {
     Input publicKey;