FoXRI

From I-names Development Wiki

FoXRI by William Tan is a Firefox extension which adds support for XRIs. With FoXRI installed, you can use xri:// URLs as well as bare XRIs that start with =, @ or ! directly from your address bar or from links embedded in web pages.

FoXRI also includes FoXRI Explorer which provides a human-readable listing of the services listed for a given resource. The Explorer has built-in support for accessing various service types including contact forms and Skype links.

FoXRI makes use of the public proxy resolver at xri.net.