Comment by err4nt

Just being real here for a moment - Firefox probably wouldn't exist if Google didn't give them millions, so the continuing existence of Firefox is thanks at least in part to Google taking them on as a project.

Now secondly, Firefox does have some very real performance bottlenecks that other browsers do not have. This means (and has been my experience already) that you can build experiences in all other browsers that are buttery smooth and nice, but that will cause crashes in Firefox. In my own work, to get around this I ended up making my product inferior in all browsers so it would not crash Firefox. But if I was big enough and had a team of more than 1, could I have implemented a solution that worked in Firefox and another that worked in other browsers, and delivered the best experience I could to all users of all browsers?

There's no need to jump to malice on Google's part if what they're doing is legitimately in an attempt to ensure that Firefox users have the best experience overall.