1. Use of Google Analytics
In principle, all IP-addresses are anonymized to comply with the Data Protection Law in Germany and the EU.
Furthermore, you can prevent the evaluation of your data by Google Analytics by using the deactivation add-on for browsers. This can also be configured with Firefox browsers by using the NoScript add-on.
2. Use of Facebook-Plugins
This site uses so-called social plug-ins by the Facebook social network, which is operated by Facebook Inc., 1601 S. California Ave, Palo Alto, CA 94304, USA ("Facebook"). If you visit our website pages that have such a plug-in, a connection will be established to Facebook servers where the plug-in will be displayed on the website page by communicating with your browser. As a result, the website pages that you visited will be transmitted to the Facebook servers. Facebook will assign this information to your personal Facebook account if you are logged in as a Facebook member. This information will also be associated with your Facebook account when using plug-in functions (such as clicking the "Like" button or posting a comment), which can only be prevented by logging out before using the plug-in.
Further information concerning the collection and use of data by Facebook, as well as your rights and means to protect your privacy, can be found on the Facebook data protection / privacy pages.