While Mozilla generated $429 million in royalty revenue in 2018, their Firefox market stock has been steadily declining. After new subscription products failed to produce enough revenue, 70 employees were laid off. With most of the company’s revenue coming in through Firefox, new methods for increasing the budget have been experimented with. A virtual private network service is currently in the works that would cost customers $4.99 a month. While it is still unavailable to the public, a waitlist is offered for customers who are interested.
Source: https://arstechnica.com/gadgets/2020/01/mozilla-lays-off-70-people