How can you make work easier?

Question

Google Chrome

There is a web service in which it is necessary to periodically update / add electronic signatures (ES) to enter this system.
When loading an ES, its contents are displayed in the system interface: full name, validity dates, serial number, etc.
When creating an employee and adding an ES, you must take this data and substitute it in the appropriate fields.
In what direction do you need to look to solve this problem ...?
My thoughts: we need some kind of script that will embed itself on the page and, at the click of a button, parse the data from the certificate and fill in the required fields with them.
Can this be done and how?