>> The government is claiming that the search market is being monopolized, not by having the best results, but by paying $45 billion dollars/year to various browser suppliers to make Google the default browser. That's the illegal act.

And google is going to say correctly that consumers are free to switch search engines. They are free to enter “bing.com” in google chrome and it will take them right where they want to go: to another search engine!

I note above that I am not sure google’s payments are pro-competitive. They probably aren’t. It’s fair to be uncomfortable with them. But to make an antitrust case on monopolization of search you are going to need more evidence than those payments.