Having to pay lawyers for legal issues shouldn't be a reason to lay off 250 employees. It certainly can cost a lot, if they are getting service from top-legal firms, working on billable hours. But they can choose to stick retain lawyers for important matters such as IP-rights, etc., get help from the community for other legal matters and work. For example debian has the debian-legal mailing list, where a lot of lawyers hang out and are ready to help. I certainly would like to contribute if any questions regarding my area of expertise popped up.
Big law firms also do a lot of pro-bono work. Since Mozilla is a foundation they might also try to exercise these channels.
If an OSS community like Debian can manage this, why shouldn't Mozilla be able to do it.
Covid-19 crisis shouldn't affect Mozilla, everyone is still using browsers while working at home.
There are also other ways to raise money for a corporation, for example Mozilla can go public to raise money to sustain their workforce and finance important infrastructure updates such as Servo engine.
