I'm working with an extremely old database system containing people and associated PDFs. I can access most data over a webbrowser, however PDFs cannot be requested via web-api - I do however have the liberty of loading any javascript library, and use chrome webdev console.

I want to get a proof of principle working, where I can load a person's PDFs. But I'm not quite sure what the best approach is.

1. Idea to upload a file to the website's local storage in my browser (since it's viewed several times). However I seem to be lacking a good library to save/load files from the cache directory. This library wasn't updated since 2016 and Filesaver.js doens't seem to be keen on loading the files after saving. Using a fully-fledged database implementation seems overkill (most files will be <= 5-10MB)
2. Loading a file from local storage (even if dir is added to workspace in chrome) seems completely impossible, that would've been an alternative
3. adding the local file path to a <a href=""> element did not work in chrome

Is there a feasible approach to manage/associate PDF files on my local drive with the website I'm working with (and have full client-side control, i.e. can load any library)?

Note: Access is restricted, no chrome addons can be used and chrome cannot be started using custom flags