Let's say End Users have a value or token stored in their PC (let's say a file) and I want to get that value from browser (JavaScript) and it will be done automatically (No manual upload).
The only browser End Users are allowed to use is Google Chrome, and it doesn't support NPAPI so I suppose I can't use Java Applets. I was thinking about a Chrome extension, plugin or maybe a standalone application that interacts with browser to "pass" the value.
The only thing that matters is getting that value from End Users PC automatically
Any ideas are welcome and appreciated.
EDIT 1: I The value is generated by a desktop program, so I can't use localStorage (I guess)