Any reason the images need to be stored on firebase? You could download and convert them in advance of generating the listview. How and where are these base64Strings created ? Where are the original image files?
from here like any image, I store the image to db because I will create two apps which is for admin and for customer in admin it will upload the images so that in the customer app I can get the images
is yes using firebase to upload ang get a url of the image , like upload from image picker it will convert into url and it will be stored to the firebase so in the other app I will get the url of the image from firebase to set it inside the list viewer
blocks (I used three web components for the three functions,but you could use just one, by setting action variables. You will also need to setup a routine for the sequential numbering of your images)