When you have no Internet, or when the Internet is so slow, wouldn't it be nice to be able to type (example) wikipedia://wiki/Egypt for immediate offline access to a wikipedia article? You will still need to download the wikipedia XML dump for offline use, but you will not need to run neither MySQL nor mediawiki - nor will you need Internet connection (except for viewing the article images, which will not be available offline). All the readonly wiki stuff will be done by firefox itself. Features, Page viewing: Articles, Talk, and Search: Wildcard search by title. This version is the first release on CNET Download.com.
||Windows 2000/XP, Firefox 1.5 - 2.0.0