Well, the EU should just fork or support existing open source Mozilla projects and pay developers... but looking at the budget there seem to be a lot of... unnecessary... money sinks. 80 Mil for management... 200 for dev... but the security team had to be downsized... yeah right. https://assets.mozilla.net/annualreport/2018/mozilla-fdn-201...
Mozilla never provided a way of donating directly to Firefox.