SimplySecure – Facebook is an add-on for research purpose. They manage user’s Facebook Privacy setting by one click. They categorized the settings into three categories: Basic, Medium, and Advanced.
Here are more details about the add-on:
To use the app, please login to your Facebook first. Then click on the SimplySecure-Facebook button (up-right ), and choose one of the three levels.
We do not look at the username and password, nor transmit it outside. We just use the encrypted tokens to send HTTP POST request to modify your settings.
Pick up this add-on at the Firefox Add-ons website.