Customised pdf view not from browser

Hello

I understand that under pimcore asset, if we upload a pdf file and preview them when double click, it will call out the browser pdf viewer (i.e Firefox browser built in pdf.js). However this pdf viewer is from the firefox browser extension, what if I want to embed my own customised pdf.js viewer, is there any way i could do that. please advise!

Is this the right script to embed.
C:\xampp\htdocs\pimcore\modules\admin\views\scripts\asset\get-preview-document.php

thank you

Ed