Login to your Stacks address that contains the asset.
For this guide I’m using https://wallet.hiro.so
Click ‘Account’ under Basic tab go to the edit option.
Enter your URL and click ‘Save Changes’ (requires STX for small gas fee)
Sign the Hiro wallet confirmation, wait until the block confirms, and your done.
Your .btc asset URL will become https://(your_address).btc.us for any normal internet browser.
Using Unicode/Punycode .btc assets
Punycode formats can translate to Unicode graphics within browsers, enabling you to use unique displays like emoji’s or other languages as your URLs.
Using a Punycode converter you can see the graphics and also use them.
Copy the emoji’s from site’s like this, to get the copy right then paste into your internet browser