You can't donate to Mozilla Corp full stop. Besides which Firefox users are strongly opposed to "nags" in the browser as Mozilla have found. Even wikipedia, wit

You can't donate to Mozilla Corp full stop. Besides which Firefox users are strongly opposed to "nags" in the browser as Mozilla have found. Even wikipedia, with it's massive reach and yearly nags, "only" makes ~$120 million. Firefox could never hope to reach anything like that from donations alone and it needs many times that number to keep pace with Google Chrome's practically unlimited funds.