I have read your message and I don't know how to introduce my self now, but I hope you are doing well :)
Anyways, what I can offer to you is to create a browser extension that will do what you want. However, in order to store data from the form, and pull the data from your affiliate websites, you need to have a server to which I can communicate with.
Do you have a server?
Also, when do you plan to start the project and when is the deadline, if there is one?
Anyways, feel free to hit me up so we can talk more about this. I am very responsive. All the best