I completely agree where you're coming from however, in the case of Mozilla I believe that the reference is relevant.
If you see that the company is producing a good product that you're donating to support. Would the "customers" (supporters) want to support the time and cost associated with kicking out the CEO over personal+(believed to be) private activities? (Context: Brandon Eich donated 1k of his personal money to a conservative/anti-gay org, and an activist within mozilla found+escalated this and claimed hostile work environment, eventually got him removed)
If I was donating, I would be pissed to know that valuable time was wasted about that and the loss of talent of personal politics and disagreement.