It's not her actions, it's her past workplaces. AirBnB in particular is concerning. It's not exactly a secret that thanks to AirBnBs business model, and the lack of regulation of it, that the housing markets in several countries have gotten fucked completely. Something she chose to work with and directly support.

I somehow rank the right to have a place to live slightly above the right to have open access to the internet (though not by much), and as such I wouldn't want anyone with her affiliations in any such senior position at Mozilla, temporary or no.