Blocking html5/modern browser features or using an old browser is a fundamental mistakes !
At this time, is there still a "legitimate user" using Firefox v51?
it will only trigger an alarm.
The best defense against FP is to present ourselves as "innocent and honest user".
In short, if you are Joe, you only need to appear as "jane".
In the past I used multiloginapp, but as ThatWeb20Guy mentioned, the free version of multiloginapp is lack critical features.
Others uses VM, but I don't like using bloated/complicated things.
Because of that for the past few days I tried to switch to ndalang for my "social" projects.
it's free version and full of anti fingerprint features, only limited to 5 device profiles.
It seems to meet all of my needs, and I'm considering buying their pro version, which is also much cheaper than multiloginapp.