Firefox started fucking with stuff like the interface and built-in add-ins. Their CEO or something made a donation to anti-homo groups, and that made the screeching reeees screech harder.

Chrome became a better, doesn't get in the way browser for most people - it offered a clean interface that didn't change much over time.

I feel like this data is faked because they're trying to kill the browser so everyone switches over to Chrome and other less privacy oriented browsers. I have a hard time believing it's only 2%. It comes pre-installed as the default browser in most popular Linux distributions. I also use it almost exclusively for work.