The "cartoons" are buried in the navigation at the end of the post:

https://hacks.mozilla.org/2017/02/a-crash-course-in-just-in-...

https://hacks.mozilla.org/2017/02/a-crash-course-in-assembly...

https://hacks.mozilla.org/2017/02/creating-and-working-with-...

https://hacks.mozilla.org/2017/02/what-makes-webassembly-fas...

https://hacks.mozilla.org/2017/02/where-is-webassembly-now-a...