Data from your browser fingerprint may not seem that much, but it's quite valuable on hands of group/government who perform all kinds of data collection to perform data de-anonymization.
Perfectly valid concern.
I would argue that Tor or any browsers of that sort does enough to obfuscate the data such that an adversary wouldn't really be able to correlate the data on a large scale. I doubt If that is indeed a threat, then using those SPV wallets which leaks privacy wouldn't be suitable and there are far better things to worry about so this wouldn't really come up as an issue.