Dashlane - Password Manager.
Sticky Password - Password Manager.
DuckDuckGo Privacy Essentials Protect your data as you search and browse.Protect your data as you search and browse.
Privacy Badger - Privacy Badger automatically learns to block invisible trackers.
LastPass - Password Manager.
Watch Your Hack - Fantastic guide about security, this is a MUST READ.
Password-alert - Password Alert helps protect against phishing attacks.
uBlock Origin - Ad Blocker.
Have I Been Pwned? - Check if you have an account that has been compromised in a data breach.