FindThatFont! is a handy and free tool that allows to preview fonts that are installed on your system and to classify them into over 30 different categories. By using this categorization you can find any font on your system faster than ever before. FindThatFont! is completely programmed in XUL, an XML/Javascript-based programming environment in which, among many other programmes, Firefox and Thunderbird are made. Thanks to the built-in features of XUL, FindThatFont! has an extension manager and allows developers to modify or extend the programme with endless many features. One of the feature I wish to implement is to allow the user to install and uninstall font on the system, and to view uninstalled fonts.