It's really a shame, and I've mentioned this before. If Mozilla sells a 'Developer' version of Firefox that is technically fully open source, but the idea is that it will directly support Firefox development, I will pay, you can add tiers, a VPN (since they're going to offer this anyway) and other goodies (maybe I can finally have a cool @firefox / mozmail.com / foxmail.com email or whatever) and I would probably subscribe to pay for higher tiers if it brings me other benefits, the email bit I mention because they do already provide an email client, it's a shame they never produced their own email service to subsidize their efforts elsewhere.

Mind you they already have Firefox Developer edition, they can keep it free and add a Firefox Professional Developer Edition that guarantees funds go to better funding Firefox development and I will be one of the first to pay for it, if it's got a monthly subscription or yearly. No "discount" tactics either, please, it makes no sense for someone trying to maintain a lot of non-profit open source projects.