My 11-year-old wants to learn programming and eventually create something like Firefox. What language, editor, or beginner-friendly program would be a good place to start?
5 Answers
It helps to separate two goals: building a browser from scratch and building a small browser-like app. The first requires years of work involving networking, HTML, CSS, JavaScript, security, and rendering. The second can be a manageable beginner project using an existing web-view component.
Another path is to customize an existing browser with HTML and CSS. That can teach useful web skills and give your child an immediate way to change the appearance of a familiar application.
Start with Scratch to learn programming logic through simple games and animations. Once those concepts feel comfortable, move on to Python, which is beginner-friendly but powerful enough for many kinds of projects. A full browser comparable to Firefox is a huge undertaking, though a small program that displays web pages is much more realistic.
Scratch is an excellent starting point, especially for making games. If the visual blocks feel too young, Lua is another approachable option, followed by Python once the basic programming concepts are familiar.
A simple browser project can be made in C# using a desktop interface and a built-in web-view component. Adding an address bar, back button, and navigation controls makes it feel like a real browser without having to implement web standards from scratch.

That sounds like a fun project to work toward after learning the basics.