One of the weakest features of Windows Mobile is the current web browser, Internet Explorer Mobile. There are several better alternatives such as the fantastic Opera Mobile 9.5 for Windows Mobile that is included on some devices as the default browser and the Skyfire proxy browser (I can watch Hulu.com with this browser). There has been talk for quite some time about Mozilla entering the Windows Mobile space and as reported by WMExperts.com the Fennec browser is now available in very early pre-alpha form (aka milestone release) to try on HTC Touch Pro devices. Make sure you have a backup of your device and are willing to risk a hard reset before trying this software out as it is very early in the development cycle and not that stable.
The Mozilla mobile browser, Fennec, was released last year for the Nokia N810 in early form and I have it on my device. I find it to be too slow to really be usable though and have read that this early version for Windows Mobile is acting about the same. At this time, you won't really be able to use it as your default browser, but it is good to see Mozilla working on an alternative for Windows Mobile and Nokia Tablet users.
I have an HTC Fuze and plan to try out Fennec soon on this device and may post a comparison with my N810 as well. Have you tried out Fennec on your HTC Touch Pro yet?