Isn't building a browser a bit wired for a class thats called "Programming languages"? I'm main sure when you write a browser you have to write a parser and at least an interpreter but these are not things I would put into a PL Class.

But it seams to be a Udacity policy to have a "What could i do with this if I new alot about it". Instead of "AI for Robotics" the call it "Programming a selfdriving car", instead of "Fundamentals of CS" they call it "Building a search engine".