Firebase list alphabetically arranged

I would like to get a firebase list
neatly in a dropdown
can anybody help me

We need to know more about your issue.

Is that a list of entries or a specific entry?

If you want to arrange a list in alphabetical order, use ListUtils.

where do I download that extension it seems that it is no longer available

The ListUtils extension is available for download here.

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Or you could use

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sort the content on the arrow
but what I want is a firebase content in a spinner

Call data from firebase, once got value added to a list, set spinner element to sort list . For example I use spinner to choose tags and once selected I call value for specific tag. In order to soth them ..