Maybe it has to do with its competitors being a 1.7 trillion dollar company and a 2.5 trillion dollar company!
Winning against those requires not only better technology AND marketing AND consumer favor, but also leverage in the legal processes that enable/disable network effects. So anti-trust is unfortunately one of Mozilla's biggest hopes.
I think the point here isn’t winning, it’s surviving. They need to maintain enough market share to keep going, but they don’t need to be the dominant browser. The goal of avoiding a monoculture can be achieved with a smaller marketshare.
Googs just gave them $400m which means they have soooo much more than $400m. FF has to pay all of its budget with that, so hiring lawyers to take on Googs with that same bucket of money will never work. Googs will continue to give Moz $400m, but then turn right around and spend $401m on their lawyers to fight off whatever Moz can afford.
You can have the best product and still receive little traction because the competitor is a megaCorp with huge marketing budgets and able use its size to make it harder for the little guy with the better product to compete. At that point, legal recourse tends to be the only action left. Googs isn't afraid of this, because they know Moz can't compete financially.
With Google giving them new golden handcuffs every year Mozilla is unlikely to do anything to upset the status quo, including lobbying for anti-trust enforcement.
Winning against those requires not only better technology AND marketing AND consumer favor, but also leverage in the legal processes that enable/disable network effects. So anti-trust is unfortunately one of Mozilla's biggest hopes.