Exch is a small utility written in XUL and JavaScript. It can either be installed as a Firefox extension or as a desktop application (*note* the desktop version and Firefox extension may not contain the same features) that utilizes the XULRunner runtime. It allows the user to enter two currencies and get them converted from one to the other using data obtained from Yahoo! Finance.

As much as Exch is an exercise in XUL development, and an example of XUL to others, it is quite useful also!

The information obtained is only as accurate as what Yahoo! Finance provides -and- is the same information that can be obtained from http://finance.yahoo.com/currency.

• Read the various blog posts regarding Exch
• Look at the Mozdev project page at http://exch.mozdev.org/ (not being updated)
• Download the Firefox Add-on