The "other things" is what most people seem to have problem with.
Mozilla burns a batshit amount of money on feel good fancies.
If it were focused on its core mission -- building great software in key areas -- it would see it can't afford this, because that's the same money that if saved would make them financially independent of Google.
> In 2018, Baker received $2,458,350 in compensation from Mozilla.
> In 2020, after returning to the position of CEO, Baker's salary was more than $3 million.
> In 2021, her salary rose again to more than $5.5 million,
> and again to over $6.9 million in 2022.
>
> https://en.wikipedia.org/wiki/Mitchell_Baker#Mozilla_Foundation_and_Mozilla_Corporation
edit: in 2023 they took in $653M in total, $555M of which was from Google. They spent $260M on software development, and $236M on other things.