For those who actually let their browsers store passwords I recommend looking for extensions that integrate the password storage with the native password manage

For those who actually let their browsers store passwords I recommend looking for extensions that integrate the password storage with the native password management systems such as Mac OS X's Keychain, KDE's KWallet or GNOME Keyring. Some browsers may even support that by default. That at least ensures the passwords are stored encrypted and the browser can't access them without the user's reauthentication.