I know very well how important the tool was for his daily work, a WhatsApp update and another google chrome browser blocked the attachment of files.
I have worked to fix the error as soon as possible to correct the error, however google extension did not allow me to publish in the google extensions store.
WhatsWEB – FREE
It is a LITE or basic version that allows you to send messages to your contacts or from a CVS file, automatically from whatapp web.
It is a version that allows you to send messages to your contacts or from a CVS file, attach image, video, audio, document or other files (up to 6 MB), schedule a delay time.
This version contains all the features of WhatsSTART, in addition to custom fields that can contain such as customer code, payment date, upcoming maintenance date, debt balance, and other fields.
It also includes a chat extractor, contacts and export contact from a whatsapp group.