On Google Chrome:

1. Go to your settings

2. Scroll down or search for 'On Startup'

3. Select 'Open a specific page or set of pages'

4. Then 'Add a new page'

5. Then add: https://randomneocities.neocities.org/

On Firefox:

1. In the top right corner of the window, click the hamburger icon.

2. Click on 'Options' and go to 'Home'

3. In the bar next "Homepage and new windows", input: https://randomneocities.neocities.org/