Investigate preferences set by ffprofile.com

[nodiscc]

While reviewing https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks, I foudn a link to https://ffprofile.com/

Welcome to the Firefox Profilemaker!
This tool will help you to create a Firefox profile with the defaults you like.
You select which features you want to enable and disable and in the end you get a download link for a zip-file with your profile template. You can for example disable some functions, which send data to Mozilla and Google, or disable several annoying Firefox functions like Mozilla Hello or the Pocket integration.
Each Setting has a short explanation and for the non obvious settings links to resources describing the feature and the possible problems with it.

Thsi tool shares common goals with pyllyukko/user.js, with sections named

• Annoyances
• Browser Features
• Privacy
• Website Tracking
• Security
• Addons
• Enterprise Policies

We should investigate preferences set by this tool (some are inspired by this user.js, the source can be found here https://github.com/allo-/ffprofile).

Related to #256 (improve automation, including adding a tool to compare this user.js against others)