I use this Firefox addon. It destroys cookies set by a tab when you close it, by default. You can turn it off selectively per-website, so it's easy to stay logg

I use this Firefox addon. It destroys cookies set by a tab when you close it, by default. You can turn it off selectively per-website, so it's easy to stay logged in when you want to be. https://addons.mozilla.org/en-US/firefox/addon/self-destructing-cookies/ https://addons.mozilla.org/en-US/firefox/addon/self-destruct... BetterPrivacy completely destroys Flash localstorage on close, which is important because SDC doesn't get them. https://addons.mozilla.org/en-US/firefox/addon/betterprivacy/ https://addons.mozilla.org/en-US/firefox/addon/betterprivacy...