[matthewmacleod]

There could be many reasons for this.

1. Pixar is a private for-profit company, while Mozilla is at least in part a political nonprofit. For obvious reasons, people are more concerned about the political positions in such a case.

2. I suspect that many people would find the act of donating to a religious body, which holds a wide-ranging diversity of opinions on many subject (not all of which an individual may agree with) as distinct from the explicit act of making a donation for one specific political aim.