ECSS is a browser extension publisher, most of their extensions are productivity extension.
June 21st, 2022
QQ群成员数据提取器,快速提取QQ群成员QQ邮箱地址或其他资料,并几乎可按任何形式导出,例如:QQ码、QQ邮箱、按行分隔、按分号分隔等等...
You could send emails to publisher.