By using this extension you may send the URL of pages you are currently visiting to your library's catalog server. Such information is sent only if you are actively using the extension; it is never sent automatically. If you wish to avoid this you must turn off the referrer URL by setting network.http.sendRefererHeader to 0 in your preferences.
In addition, you may be sending information such as ISBN and ISSN numbers to OCLC, DOIs o CrossRef's server, and PubMed IDs to the PubMed server in order to retrieve metadata information. If configured for your edition, you may also send URLs to your library's EZProxy to determine whether the current page can be proxied when using the right-click context menu. Use the LibX -> Preferences panel to turn these services off if desired.
For more information on LibX, please visit the LibX Homepage.