In which file are stored an add-on settings/options?

Add-ons Add-on Support
1

Lest’s go inside the FF user profile’s folder:

In which file are stored an add-on settings/options? How to find the file storing a specific add-on?

Like this one:
https://addons.mozilla.org/en-US/firefox/addon/easy-google-translate/

Thanks in advance and regards

2

It depends on how the extension is designed and which storage API is used.
If it is a WebExtension and it uses storage.local, then the settings is stored in Profile Folder/profile.name/browser-extension-data/{extensionid}/storage.js
However, an extension can also use storage.sync which stores the settings in the cloud for example, and unfortunately you can’t have access to it.

3

or any of the DOM storage APIs etc. It would really help to state your intent, too.