Flagfox also includes a number of other useful features such as Alexa lookups, WOT score and translation help. All the info you want to include or see will pop up when you right-click on the flag in the address bar. For instance, you can choose where the flag appears, customize exactly what appears as well as add other details to the list of information.
Some facts are related to security or you can look-up a website, check validation using W3C Validator, or simply copy the information. A lot of this information isn't necessary for the average user but its useful for those that may be doing research or are concerned about privacy and security.
Flagfox is a powerful Firefox extension for gathering data on a range of subjects about websites.
Flagfox is a cute location add-on that hides a lot of extra functionality.