Privacy Shield For Outlook

Privacy Shield is an add-on that password protects access to Outlook's main interface. It also stretches the Privacy Dialog, can be activated on startup, has a memo pad, and can hide Outlook.

http://e-gadgets.freehostia.com/addins.htm#shield

Perma Tabs

Perma Tabs is a Firefox add-on that turns tabs of your choice into permanent tabs ("permaTabs"). PermaTabs can't be closed accidentally (even when closing multiple tabs at once), and will stick around between sessions. Useful for keeping URLs you use often, always one tab away. Also, useful for picking up articles where you left off during a previous session.

https://addons.mozilla.org/firefox/2558/