There are no uninteresting cats; only uninterested people.
An extension that is aptly named - it will provide you with cats, nothing else. Each day a new photograph of a cat, with perhaps about once per month a bunny or dog sneaking in. All pictures adhere to a high standard of beauty and photography.
There is no purpose to this extension beyond making you smile one additional time each day. And that it will.
Upon installation, the extension will add a small browser button. Clicking it will produce your daily cat. It will never introduce itself unless you click the button.
You can click the button as often as you like, but a new cat will only appear overnight. Each day has its own cat, like a picture calendar.