- '$tmsserver' => ['tmsserver', DI::l10n()->t('Tile Server URL'), $tmsserver, DI::l10n()->t('A list of <a href="http://wiki.openstreetmap.org/wiki/TMS" target="_blank">public tile servers</a>')],
- '$nomserver' => ['nomserver', DI::l10n()->t('Nominatim (reverse geocoding) Server URL'), $nomserver, DI::l10n()->t('A list of <a href="http://wiki.openstreetmap.org/wiki/Nominatim" target="_blank">Nominatim servers</a>')],
+ '$tmsserver' => ['tmsserver', DI::l10n()->t('Tile Server URL'), $tmsserver, DI::l10n()->t('A list of <a href="http://wiki.openstreetmap.org/wiki/TMS" target="_blank" rel="noopener noreferrer">public tile servers</a>')],
+ '$nomserver' => ['nomserver', DI::l10n()->t('Nominatim (reverse geocoding) Server URL'), $nomserver, DI::l10n()->t('A list of <a href="http://wiki.openstreetmap.org/wiki/Nominatim" target="_blank" rel="noopener noreferrer">Nominatim servers</a>')],