Besides, people aren't using relativism here. Relativism is the idea that nothing is truly good or bad, it's all a matter of personal or cultural preferences. That would mean that people were saying that that Mozilla's behavior about X, Y, and Z isn't really bad. But that's not really the argument here. People are generally saying that despite engaging in the bad behaviors X,Y and Z, Mozilla is still in balance better than Google, and arguably still worthy of some level of support. To phrase it in terms of Aristotelian ethics: "For the lesser evil can be seen in comparison with the greater evil as a good, since this lesser evil is preferable to the greater one, and whatever preferable is good". You're unquestionably correct that Mozilla should be criticized, even harshly so. But you can criticize a company (or person, or party, or country) and still support them. Or if short of support, still prefer them to the available alternatives.