Write a Firefox extension that spoofs realistic values for each of the fingerprints tested on AmIUnique.com

If you visit [login to view URL] and hit 'view my browser fingerprint', it will show a list of fingerprints that browsers put out. I need a Firefox extension coded (which is Javascript), that will randomly spoof realistic values for each of the fingerprint tests. Returning no value in the case of something that should normally return a value does not work. The spoofing should apply automatically at browser launch and stay the same for that session. User agents must be realistic and consistent between the headers used and the [login to view URL] setting. Spoofed values for the fingerprint tests should be realistic for the user agent / apparent system being spoofed. An easy way to handle most of this may be to adopt the code from this Github page, but I just don't know how to modify it to apply automatically at launch, and I also don't know know if it blocks values or actually provides realistic values. Github: [login to view URL] One important thing: I'd like a 'mobile' and a 'desktop' version of this extension. Mobile version only spoofs fingerprinting as realistic mobile devices, and desktop only spoofs fingerprinting as realistic desktop devices.