PixelBlock is a Gmail extension that blocks email tracking attempts used to detect when you open and read emails. This Chrome extension, developed by omar.w.qureshi, aims to enhance your privacy and prevent others from tracking your email activity.

One of the main features of PixelBlock is its ability to detect and block tracking attempts inside emails. When it finds a tracking attempt, it displays a distinctive 'red eye' icon, indicating that the tracking has been blocked. This visual cue allows you to easily identify and avoid being tracked by senders who use email tracking techniques.

PixelBlock runs locally on your browser and does not store, save, access, or transmit any data from your Gmail account or computer. This ensures that your privacy and personal information are protected. It is a free extension available on the Chrome platform and falls under the category of Browsers, specifically Add-ons & Tools.

Update (April 9, 2019): PixelBlock has improved its performance, providing even more effective blocking of email tracking attempts.