Fennec is a particular version of Mozilla, designed for handled devices and internet tablets. With the latest development version, stability has been improved, but the application is still a bit slow and "memory hungry". Speed an memory improvements are scheduled for the next release (Alpha1 - September 9, 2008).
Latest available version, Fennec M7, has the following improvements:
To install it on your tablet, you've to configure Application Manager with the following parameters:
If you're not sure or if you want further instructions about installing Fennec, you can find a step by step guide on Mozilla website.
Note: M7 supports the Maemo chinook & diablo distributions.