Button to open a link from a firebase variable

Hello, I apologize for my English translated from google, but I’m trying to put a button on APPGYVER so that it opens a URL registered in a FIREBASE variable, does anyone have a tip or a torial that shows this? Thanks.

If i understand correct you can do that by fetching the url in your app and, then if you use http request you connect that with a variable and then that variable with the button.
if you use the firebase connector in appgyver, the data will be fetched in a data variable, so you can connect the button with the data variable.
So the first question is do you know how to make an http request or connecting appgyver with firebase?