This add-on is essentially a WebExtension version of the Self Destructing Cookies add-on. Whitelist cookies you want, and the rest are deleted when they aren't being used! The only difference as of now is that the WebExtension API doesn't have proper LocalStorage support, so this add-on can't clear that yet.

Thank you SO much Kenny Do for doing this! You have no idea how much this means to me, and all the other 200,000+ users of SDC! I know a little JavaScript, HTML5, and CSS, and I was almost desperately trying to learn WebExtension so I could do a rewrite myself. I'm so glad someone smarter than me took the time to do this.

Thanks again! You're awesome!