@ IDN - AddressBar is a free Chrome add-on that enhances the browser address bar by enabling it to accept Internationalized Domain Names (IDN) characters. With this add-on, users can simply type '@' followed by a space or tab, then enter the domain and top-level domain (TLD) directly into the Omnibox. This eliminates the need for additional tools and allows for easier typing of IDN characters.

One of the main features of @ IDN - AddressBar is its ability to enable I18N search right in the address bar. This means that users can perform searches in different languages without the need for additional search tools. However, it's important to note that the add-on has limited language support.

To use @ IDN - AddressBar, users need internet access as the add-on is dependent on the "Google Transliterate" API. Additionally, users can select their default language by accessing the options menu.

Overall, @ IDN - AddressBar is a useful Chrome add-on for users who frequently work with Internationalized Domain Names and want to enhance their browsing experience by typing IDN characters directly into the address bar.