Mozilla VPN - A VPN from the trusted pioneer in internet privacy.
Email Privacy Protector - Check the presence of email ids on your webpages using Email Privacy Checker tool and protect yourself from email spammers.
sshuttle - sshuttle: where transparent proxy meets VPN meets ssh
PixelBlock - Block email open tracking inside of Gmail
Outline by Alphabet - Control and build your own VPN 🛠️
Ugly Email for FireFox - Get back your email privacy, block email tracking