Support an overt link to a adobe PDF file of a paper bill that can be downloaded for bill printing/filing.
Because fake PDF blob file in a webview browser window is blank and gives error...
What's Actually Happening
The AGL app likely doesn't render your telco bill natively — instead, it opens an internal mini-browser window (a "WebView") that loads the agltelco.com.au portal and generates the PDF dynamically as a "blob" (Binary Large Object) directly in memory, rather than as a file hosted at a normal web address.
Android's WebView component has a well-documented limitation where it fundamentally cannot download or open blob-based files the way a full browser like Chrome can — this has been a persistent issue reported by developers for years, with one detailed technical writeup describing it as "the real reason Android WebView cannot download blob files".
The specific error you're seeing, net::ERR_FILE_NOT_FOUND, matches exactly what other users hit in identical blob-URL-in-WebView scenarios, including one Stack Overflow case that produced an "IllegalArgumentException: Can only download HTTP/HTTPS URIs: blob:https" error for the identical reason...
