Anything you do like this to "customize" the default Tor Browser install can reduce your privacy instead, as it provides a factor by which you can be fingerprinted and differentiated from the larger base of users using the Tor Browser as-is.

Source: see the Tor Browser docs on why they enable JS by default (though NoScript is installed and can be configured to block all JS, if you know the risks) https://www.torproject.org/docs/faq.html.en#TBBJavaScriptEna...