The <script> attributes
"Lots new in Firefox, including “game-changing” support for WebAssembly" is a new blog post on mozilla.org. The article also explains what WebAssembly is: It "allows complex apps, like games, to run faster than ever before in a web browser". This will make the web more exciting, it will take a while.
"99 Bottles of OOP is a practical guide to writing cost-effective, maintainable, and pleasing object-oriented code". A book by Sandi Metz is always worth a read. Even if you "don't care about OOP", I bet you it will be a big learning reading this book.
The site kata-log.rocks lists many katas for practicing at your next dojo. Each kata has helpful categories like TDD, Refactoring, Pair-Programming and others, which makes it easier to choose the right depending on what to practice. You can contribute via a pull request on github. Thanks Egga, who has built this page.
"CSS GRID LAYOUT" is a presentation by Rachel Andrew where she gives a nice introduction on what it can do and how to do it. Grid layout is the newest approach to layouting complex websites in the browser using CSS. It has just shipped in Firefox 52 (March 7th) and Chrome 57 (March 9th).