Possibility to get PDFViewerApplicationOptions before document is loaded

[angelaki]

Regarding your documentation, both PDFViewerApplication and PDFViewerApplicationOptions can be accessed after the document was loaded (onDocumentLoad.subscribe). The problem is, that most of the options must be set before the document gets loaded (https://github.com/mozilla/pdf.js/wiki/Third-party-viewer-usage). Is there some possibility to achieve this?

[scry-UrjitDesai]

I want the same thing any luck achieving the required ?