I am sure you could look that up and spin it anyway you see fit. Generally curious if donation support is commonplace considering the income of these companies based on gsearch payments is quite large. Mozilla has tried a number of things, which is quite common for any tech company as the talent needs to build to learn and grow. Based on your posting history, I am sure you would just throw gas on the closest fire you see.

When it comes to donations, all of it. As far as I know, donations go to the Mozilla Foundation while the browser is developed by the Mozilla Corporation.