Another user.js For Firefox

[Shina-SG]

Now I know I know, we have arkenfox.js and Betterfox already but arkenfox.js might break a lot of sites and some of it protection really pointless in the face of using normal firefox instead or tor browser, and Betterfox is really close to being good but with many choices and different type of setting I don't think we need that, we just need a good fast to some extent reasonable privacy/secured browser for everyday use then with a tor browser doing the rest. Also btw you could test fingerprint here https://vytal.io/scan