What good is that?
Here's one cool feature:
Switch CookiePie ON in two tabs, and you can log in to different GMail® accounts in each one.
Yes it works. ;-)
1) Right-click a tab and select "don't load cookies".
2) Sign into your first Gmail account.
3) Open another tab. Right-click tab and select "don't load cookies".
4) Sign into your second Gmail account.