Mozilla has been diversifying for ages, it’s what stuff like buying pocket was all about. They should be making around 100m off the side hustles by now, plenty to keep the lights on, but still a small sum compared to the 500m they get from selling the default search engine spot.
Also, just as a reminder: Mozilla doesn’t exist to make money for Firefox, Firefox exists to make money for Mozilla’s general internet charity work.
If a chain, cable, or wire comes loose on a car then the panels are the least of anyone’s worries. Also expect emergency brakes to kick in automatically. This is a train, not a bicycle.