How to pass an arrayBuffer to a web page

I have an application that is getting binary data from a server (responsetype = arraybuffer) and a specific single page which is just a pdf viewer opened in another tab. My viewer accepts arraybuffer but how to pass it from one page to the other one ? In the url or in a cookies (after stringify) it will be too long and I can not see other options. I know that one option would be to call the server in the viewer page but I need to call the server in the application