With backendless you can map your own domain name to your file storage and thus avoid any cross domain issues with loading the file. I do this in my app and it is working out great.
I would like to make a table outside of game that can be used as a reference for my game at run time, this way I can just edit the external file and elements of my game will change without the users having to download a new update.
I also don't want the user to be prompted to download a file.
I've played around with backendless, firebase, and tried a few other things, but seems like not very many people are doing this so there aren't any good instructions out there.
even just importing a normal txt file is fine although a csv would be preferable.