I know it’s not the greatest marketing pitch, but it’s the truth.

[…]

So if you want an Internet – which means, in many ways, a world – that isn’t controlled by Google, you must stop using Chrome now and encourage others to do the same. If you don’t, and Google wins, then in years to come you’ll wish you had a choice and have only yourself to blame for spurning it now.

Source: Well, I’m Back: Choose Firefox Now, Or Later You Won’t Get A Choice