Yeah don’t do this, you cannot change your fingerprint with those tools without making it very obscure and invalid. If a site requires JavaScript you should assume that it can tell your real platform, and other properties.
I’m actually working on an article about fingerprinting, based on some discussions here Fingerprinting FAQ · Issue #1834 · privacyguides/privacyguides.org · GitHub and elsewhere. People get it so wrong, and install so much rubbish hoping to improve things, and it has the opposite effect.