Several web pages turn off the ability to right-click. The following tutorial contains examples of how to turn it back on.
Category HTML
IE9: How to Turn Any Website into a Web ApplicationInternet Explorer 9 takes a page out of Google Chrome's book and allows you to turn websites such as Twitter, Facebook, and others into their own web application. It ... 
XP: Change and Tweak ClearType FontsCleartype is XP's sweet little feature that improves rendering of fonts. Some fonts are difficult to read on LCD screens. XP's answer to this was to give the user ... 
XP: Completely Turn Off or Adjust AutoPlay / AutoRunIf you find autoplay annoying, this recipe descibes how to adjust it. Some people love autoplay, others hate it. Here is how to adjust it or turn it off. ... 
Tweaks To Speed Up The Portable Firefox BrowserPortable Firefox web browser is intended for use on portable media such as a USB flash drive but it can also be used on any hard disk drive. The ...