Open PDF file on iPad's browser new tab (Edge, Chrome)

Hi all,

I would like to ask you for help. We are using Windchill as drawings library. We also have some modelu call "Document Portal" through this module we are able to open current version of drawings. For this viewing we are using iPad with iOS system. If I open Windchill in Edge browser and want to open PDF file, for some Windchill account it wokr good and pdf file is open directly on new tab in the browser but on the same device, if we use different account, first we need to download pdf and after this open in (too waste time). There is some "hide" settings in Windchill for this? There is no issue with browser setting becase for both accounts was used the same device with the same settings. Thank you for help!!