Official Mozilla account for web developers. Learn about new web technologies, great HTML5 apps, and Firefox features.

Web standards addict.

I'm Jonathan Sampson, a web developer of nearly 20 years working in Developer Relations @brave. 🇧🇷 Falo Português. You can also find me @jonathansampson.

Co-founder of Mozilla Research. Web standardista. Author of Effective JS. Follower around of @tinycalculist as a two-person marching band.

Just another JavaScript developer.

Screencasts on the web platform for web professionals. Produced by @glenmaddern