I really dislike the way Firefox is releasing new x.0 versions like crazy nowadays. I remember back when Firefox would go through the version numbers every couple of months or years. Like the jump from Firefox 2 to 3 was huge, and so was the jump from 3 to 4.
Google doesn't own Mozilla as such, but it is true that the vast majority of Mozilla's revenue comes from Google, due to the search engine use. Still, Firefox is open source, which helps mitigate any influence Google might have over them.
This. Google's Chromium (which Chrome is based on) is technically open source, but Google's influence over Chromium pretty much makes this whole point moot.