The author may be a right-wing fellow. Nonetheless, the data he exposes are taken from official Mozilla docs.
It absolutely matters. We need to consider that a right-wing actor is likely to exaggerate claims against an organization that is ostensibly socially-minded and represents anti-corporate interests, like Mozilla.
Organization represents anti-corporate interests.
CEO gets paid almost all donations despite poor performance.
Seems pretty corporate interests to me.
I’m not denying that Mozilla has a history of poor governance. But they are the competitor to Google here. You need to consider these things in context to understand what anti-corporate means for the internet.