If they get much of their funding from Google, then I fear that the company that does no harm will eventually strong-arm Mozilla into disabling ad blockers.
My answer to that is for them to move off of Google search revenue, but they’ll need a decent funding stream to replace it.
I wish people were willing to donate more to the services they love instead of handing the reins to free-with-ads models. It’s like the drug we all can’t quit. And there is something to be said for being sustainably funded without ever-chasing growth.