PixelBlock is described as 'Gmail extension that blocks people from tracking when you open their emails' and is an app in the Security & Privacy category. There are eight alternatives to PixelBlock for a variety of platforms, including Google Chrome, Mac, Windows, Firefox and Linux. The best alternative is Privacy Badger, which is both free and Open Source. Other great apps like PixelBlock are Ghostery (Freemium), MailTrackerBlocker (Free, Open Source), Ugly Email (Free, Open Source) and Email Privacy Protector (Free).
Ghostery sees the invisible web - tags, web bugs, pixels and beacons. Ghostery tracks the trackers and gives you a roll-call of the ad networks, behavioral data providers, web publishers, and other companies interested in your activity.
MailTrackerBlocker is a plugin for the default Mail app built-in to macOS. When you view your email a 🛑 # button will appear to indicate the number of services blocked. Tap on the button to show which services have been blocked.
As you browse the internet, Big Tech Detective will alert you if the website you are on is exchanging data with Big Tech by identifying and measuring connections to internet protocol (IP) addresses owned by Amazon, Facebook, Google, and Microsoft.
OptMewot sends Do Not Sell signals to all domains a user visits when browsing the web. Such signals must be respected for California consumers per the California Consumer Privacy Act (CCPA), Regs Section 999.315(d).