Microsoft Edge, Google Chrome, and Mozilla Firefox browsers have built-in games. Edge and Chrome are easy to access while Firefox takes a few steps. From How to unlock hidden browser games:
- Edge: In address/search bar, type (no spaces) edge://surf and press Enter.
- Chrome: In address/search bar, type (no spaces) chrome://dino and press Enter.
- Firefox:
- Click on + to open new tab
- Right click on your toolbar

- Click left on Customize toolbar…
- Click and drag every icon except Flexible space to your Overflow Menu on right side
- Click on unicorn icon which now appears on the bottom row

- Use left and right arrow keys to move your Pong paddle “Flexible space” along top for bouncing unicorn