Good catch - I have noticed that Mozilla gets a lot of unjustified hate and criticism. Does Mozilla make mistakes? Yes. Does it do a lot of good? Yes. Does it deserve the abuse it gets online? Absolutely not.
I really believe it's because deep down, people love the big shiny brand Google Chrome, yet they know it's kinda fucked. So when they see things like this, they are able to justify it in their minds that they made the right decision. Confirmation Bias?
Not Mozilla; the silly "hmm isn't it actually good he ran it? whats the difference between that and black hat hackers?", except its slow drip one at a time one sentence comments that don't acknowledge his interlocutor at all.