Lawmakers and judges should not be allowed to make decisions on something they know nothing about. This is a huge problem with people not even wanting to educate themselves, and then deciding how the rest of us get to interact with the internet.
That being said, Firefox is only popular with tech folk. They have just over a 3% market share. I’m a developer and I don’t know anyone but myself that uses it. My mother would think I was talking about a cartoon if I brought it up. A lot of lemmings use it, but o would not call it a popular example.