[amluto]

> EDIT: Looks like there are already extensions doing that ! nice !

Can you send a link?

[Buetol]

On chrome it's "Tab Cookies": https://chrome.google.com/webstore/detail/tab-cookies/iahecg...

On firefox, "Self destructing cookies": https://addons.mozilla.org/en-US/firefox/addon/self-destruct...

You're welcome :)