MailTrack is the adaptation of the concept of “double check” WhatsApp (i.e. when they actually read your message) but moved to email. It is a browser extension that lets you check whether your message recipient has opened or not.
So far MailTrack was limited to Chrome and Opera, but the company has just announced the arrival of its version for Firefox , one of its most important releases in recent months. The adaptation for smartphone , as we have from within, still have to wait a little longer.
MailTrack Firefox works exactly the same way as Chrome version: once installed the extension in the browser, you will see a couple of ticks next to each mail message, marking whether the message was opened or not. As you we explained here, the Open Confirmation is done by inserting a small image in the body of the email. Continue reading MailTrack, double check for Gmail, you already have Firefox extension