@Talwynor wrote:
is it possible to install the app so that I can view all of my online Dropbox content within File Explorer without storing it locally?
You can mark your files so they're Online-only, which means they won't take up space, but if you open them they'll be downloaded back to your local drive. You can't access the files directly in Explorer without them existing locally.
If you just want to view the files, use the Dropbox website.