Search engine deals are HUGE for browsers. They're e.g. what has funded Mozilla with many billions over the last 20 years. Mozilla has tried to diversify but everything else has pales in comparison (and the donations are basically a joke).

It scales up with usage as well. Not that Safari needed funding, but Google pays Apple upwards of $20,000,000,000 per year for the privilege of being the default for that user base.

A lot of people might think $20B is a lot to pay. But search (and “other”) account for over half (>$200B) the of Alphabet’s total revenue from all sources. It’s still a bargain when you consider how few people bother to (or are even aware of the possibility of) changing their default browser.

https://stockanalysis.com/stocks/googl/metrics/revenue-by-se...