Yes, there are many web browsers that include special features for use by individuals with disabilities.

For more information on some of these features consult Better Web Browsing: Tips for Customizing Your Computer, which is a site that provides references to resources that help you customize your particular web browser and computer setup, and How People with Disabilities Use the Web, which includes a page that introduces some of the hardware and software innovations and approaches that people with disabilities use to browse and interact with the Web.