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 [1], 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 [2], 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.
References
- [1] Better Web Browsing: Tips for Customizing Your Computer
http://www.w3.org/WAI/users/browsing - [2] How People with Disabilities Use the Web
http://www.w3.org/WAI/intro/people-use-web/Overview.html