That is not a summary. The article opens with Google faking breaking compatibility with Opera in order to push their own browser. Why fake? Because the services worked perfectly when faking the user agent...
> The article opens with Google faking breaking compatibility with Opera in order to push their own browser.
It explicitly states that it got worse when they introduced their own browser, which implies it pre-dates their own browser.
I think he means that first Google was cozy with Mozilla, and then later introduced Chrome. Opera the browser predates Google the company.