Self Destructing Cookies is a Firefox add-on that automatically removes cookies when they are no longer used by open browser tabs. I’ve found this to be an excellent solution that works silently in the background.
Websites will only be permitted to identify you while you actually use them and can not stalk you across the entire web. This is the closest you will get to cookie-less browsing without breaking every second site or tedious micromanaging.
Here are a couple of other privacy-enhancing add-ons that you can set and forget:
Privacy Badger is a browser add-on that stops advertisers secretly tracking where you go and what pages you look at on the web. If an advertiser seems to be tracking you across multiple websites without your permission, Privacy Badger automatically blocks that advertiser from loading any more content in your browser.
Decentraleyes silently protects you against tracking through “free”, centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.