Mailcastr - Create email signature that tells when your email is read.✉️
Stratechery - New layout, same great words about big tech
Ugly Email for FireFox - Get back your email privacy, block email tracking
Email Parser & Analytics - Automatically adds your Gmail content to Spreadsheets daily.
PixelBlock - Block email open tracking inside of Gmail
Mailshake - Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.