If you read about the company then well... Mozilla foundation and their boss are not amazing, and payed up by google so that's not ideal. If your own web browser by default uses search engine that promotes products of competitor, and they waste ton of money of some side gigs like AI which for sure doesn't help. Oh, and also I believe that their ceo, or what is his position called, has one of the highest (or the highest) pay among UK's non-profits, and it is for sure for some reason going opposite way of precent of users if you thrown that on a chart.
For me it was also wierd that Firefox is so nice and yet few people use it. Then I started reading and understood a bit better :p Since that time I'm looking for libre (but not orthodoxic) web browser for my mobile and pc. Sadly nothing did catch my eye for now.
Aren't google news biased to what you would like to see?