There really isn't much information there (or at least I can't find it). I'm not attacking here, just giving my impression as a potential donor, albeit with some skepticism.
I was able to find information on the Ford-Mozilla Open Web Fellows program[1] and a list of events[2]. Funding for the first is obvious, for the second it seems like many of the events either aren't run by Mozilla, just recognized by them, or the funding isn't directly called out.
It would be great to see broken down what funding actually goes to. mozilla.org, as I said, seems to just be banking mostly on the Mozilla name (the phrase "Donate to Mozilla, the non-profit behind Firefox" doesn't exactly keep things clear). The donate page has no information on the subject, the Donate FAQ is a wiki page with no information on the subject.
As an example, the EFF has a great "Our Work" page[3], with a nice overview of a bunch of projects and big icons leading to really in-depth coverage of their work in each of six areas. The page also doubles as a nice portal into the subjects of interest themselves, if you want to know more.
[1] https://advocacy.mozilla.org/open-web-fellows/
[2] https://www.mozilla.org/en-US/contribute/events/
[3] https://www.eff.org/issues
