Comment by cxr

Your diagnosis is off. So many of the good workers got poached by Facebook and all the other companies that HNers dream of working for. Not all of them ever even worked for Mozilla Foundation or its subsidiaries—some simply got reassigned by the company that was actually paying them. Pre-Chrome, for example, the Firefox lead was a Google employee.

And not that it's the product of any of the people who were let go, but developer.mozilla.org is a pretty valuable and high-impact resource. It's more "advocacy for a free and open Internet" than it is "making a browser".