This is the post in question:

https://blog.mozilla.org/en/mozilla/we-need-more-than-deplat...

What is questionable about the things that she suggests? The only thing that I see there that is debatable is "amplify factual voices", and then only because it's unclear who decides what those are. But all other suggestions seem common sense to me.

If you mean the fact that she is condemning the US Capitol riot in no uncertain terms, I fail to see how that is "encouraging the division in our society". The riot itself did that, not commentary on it.