Mozilla has just released Firefox for Windows Mobile. Under the name of Fennec, which is the very first public release of the browser.
You can install Fennec on an HTC Touch Pro by navigating to the installation cab file in your exsisting browser. This will then start the installation of the browser.
Early reports vary, with some users unable to open any web pages using Fennec. Mozilla is sure to fix bugs and add new features at the browser progresses.
Happy browsing!