See? You do have meaningful control over your machine!

You are free to choose from a great number of useful and fun pre-approved apps that you love. The possibilities are limitless!

(Of course, you must choose the same apps as everyone else. You are a loyal citizen, aren't you?)

Are you the author of that extension? If not, why would you give full control over your browsing experience to a third party without any benefit?

There's a word replacer extension I used a few years ago to implement XKCD's entire list of suggested replacements, to my great amusement. Due to my predisposition I consider great amusement to be of tremendous benefit to my well-being.

I love that one. I want an atomic car.