Tools'are prompted to add your datacenter URL to your trusted sites when the setting is already in place:

Internet Explorer
  1. Click 'Tools' (A "gear" symbol if Internet Explorer 9, located just underneath the 'X at the top right-hand corner'). 
  2. Select 'Internet Options' from this menu.
  3. Browse to the 'Advanced' tab. 
  4. Click the 'Reset' button towards the bottom.
Note: There is a radio button there which, if checked, will delete all personal content (i.e. Favorites, History, Bookmarks, etc.). Also, this reset will not remove your current settings, regarding the "Trusted Sites'.

  1. Export all personal data to your local computer.
  2. Uninstall your current version through your 'Control Panel'.
  3. Locate and download the latest version of Firefox.
  4. Install Firefox
  5. Import the previously exported data.

If the problem still persists:

Click Chat with Support and reference this article.