How to get rid of .html extension when serving webpages with node.js?

I am a beginner with node.js and am using express with the ejs layout, and I want to know how to get rid of the .html extension when putting up a page. For example if I go to my localhost:3000/about.html - that works but I want it to show up as just /about. Also, having trouble figuring out how to change the favicon if anyone knows how to quickly change that from the express default.

Any help would be great thanks.