Opening local files that need a browser to open, such as html files.
Sometimes, CDs are distributed that have instructions or documentation that are a collection of static html pages, rather than a PDF or plain text file.
Do you personally ever do anything with this?
When I'm working on a new web site design, I tend to work with just local files until I'm ready to turn it into an actual template for whatever platform that it's intended for. For that, you need a browser that will open local files.