You're correct, and this is a general problem with earmarking—there's nothing to stop the organization from just shifting unrestricted funds out of that bucket

You're correct, and this is a general problem with earmarking—there's nothing to stop the organization from just shifting unrestricted funds out of that bucket to compensate. I still would donate in this scenario, because the main point is that I want to be explicit about which activities Mozilla is engaging in that I find valuable. Donating to Mozilla right now would send the wrong message.