browser extensions for Firefox or Chrome

I am looking for a browser plugin that automatically fills in online-documents for multiple people, e.g. bind the key "F1" for person no. 1, "F2" for person no. 2, etc.
Relevant information includes name, surname, birthday date, mail address, passcode, etc (see screenshot for reference and all important fields).
Data for these people should be able to be stored beforehand, e.g. in a text file or the browser plugin itself.
This plugin should then allow the user to fill out online forms for multiple people in a very short time window, e.g. for visa applications.
An identical form can be found under the link below.