I don't know if any of it is "half-effective" but it's the standard social-justicey things like "women and BIPOC in tech", as well as more recently, alerting people to the dangers of the open internet and pressuring platforms to take more aggressive censorship actions: https://blog.mozilla.org/en/mozilla/we-need-more-than-deplat...

I think Mitchell Baker would rather chair something like the SPLC than an organization merely devoted to the development and maintenance of open source software, and that's what she's turning Mozilla into.