- Electron version: 0.36.12, 0.37.6
- Operating system: Kubuntu 15.10

Try Ctrl+Shift+F, find progress freeze always.

atom/browser/common_web_contents_delegate.cc
SecurityLevelToSecurityStyle(
          SecurityStateModel::kDisplayedInsecureContentLevel);
  explanations->scheme_is_cryptographic = security_info.scheme_is_cryptographic;
  if (!security_info.scheme_is_cryptographic)
    return security_style;
  if (security_info.sha1_deprecation_status ==
      SecurityStateModel::DEPRECATED_SHA1_MAJOR) {
    explanations->broken_explanations.push_back(
        content::SecurityStyleExplanation(
            kSHA1Certificate,
            kSHA1MajorDescription,
            security_info.cert_id));
  } else if (security_info.sha1_deprecation_status ==
                SecurityStateModel::DEPRECATED_SHA1_MINOR) {
    explanations->unauthenticated_explanations.push_back(
        content::SecurityStyleExplanation(
            kSHA1Certificate,
            kSHA1MinorDescription,
            security_info.cert_id));
  }
  explanations->ran_insecure_content =
      security_info.mixed_content_status ==
          SecurityStateModel::RAN_MIXED_CONTENT ||
      security_info.mixed_content_status ==
          SecurityStateModel::RAN_AND_DISPLAYED_MIXED_CONTENT;
  explanations->displayed_insecure_content =
      security_info.mixed_content_status ==
          SecurityStateModel::DISPLAYED_MIXED_CONTENT ||
      security_info.mixed_content_status ==
          SecurityStateModel::RAN_AND_DISPLAYED_MIXED_CONTENT;