If you see this page, probably you have just created a new profile using Switchy add-on. It's strongly recommended to install Switchy in this profile too!

Switchy is a Firefox Add-On for a better management of profiles.
With Switchy you can easily change profiles, create them, assign websites to each of them.

This is a good improvement for your privacy, because in any profile you can decide where you are logged in, which plugins and addons you want, which settings you prefer for your firefox.
Switchy is free software, but if you donate 1 euro/dollar you make me happier :)