PixelBlock - Block email open tracking inside of Gmail
1Blocker - 1Blocker is a content blocking software that you can rely on to save time and money. Unlike its competitors who use JavaScript to block ads after they have been download, 1Blocker does the contrary. Read more about 1Blocker.
Ugly Email for FireFox - Get back your email privacy, block email tracking
Email Privacy Protector - Check the presence of email ids on your webpages using Email Privacy Checker tool and protect yourself from email spammers.
Privacy Badger - Privacy Badger blocks spying ads and invisible trackers. How is Privacy Badger different from Disconnect, Adblock Plus, Ghostery, and other blocking extensions?
Amazon Lite - Removes ads, sponsored products and other clutter on Amazon