Firefox and Chrome WebExtension that deletes cookies and other browsing site data as soon as the tab closes, domain changes, browser restarts, or a combination of those events.

The English Wikipedia twinkle javascript helper

The popular NoScript Security Suite browser extension.

Apache NetBeans

EasyList filter subscription (EasyList, EasyPrivacy, EasyList Cookie, Fanboy's Social/Annoyances/Notifications Blocking List)

A browser extension that encrypts your communications with many websites that offer HTTPS but still allow unencrypted connections.

uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.