Last year we started getting people involved in building and running Mozilla’s sites together to coordinate on things that would improve our web experience.
To use web fonts as an example of the benefits of coordinating, it’s great that we have a bunch of sites experimenting with the best way to use the new WOFF format. The downside though is we could get into a situation where each of our sites uses a different font.
By working together, we can find a balance where we can benefit from these experiments and then have a way to roll out what works best across our sites. Or to put it another way, I like to think of it like herding websites about cats.