[fxbl0i]

Controversial != useless. I don't like they wasted money on Firefox OS or Persona; I don't want to donate to them if my money goes there instead of to Firefox. In fact, why not let us decide where exactly our money will go if we donate?

[vkou]

Mozilla invested into Firefox OS, because they were hoping to disentangle their #1 revenue stream from ad-tech companies.

[sroussey]

It also led to the sharp decline in memory usage as that became super obvious when they went 100% mobile.