I cna’t elaborate but I can point you forward

Here are the arkenfox settings https://arkenfox.github.io/gui/?s=wasm arkenfox disables webassembly. Look for javascript.options.wasm .

Following is the description there

Vulnerabilities [1] have increasingly been found, including those known and fixed

• in native programs years ago [2]. WASM has powerful low-level access, making
• certain attacks (brute-force) and vulnerabilities more possible
• [STATS] ~0.2% of websites, about half of which are for crytopmining / malvertising [2][3]
• [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=wasm
• [2] https://spectrum.ieee.org/tech-talk/telecom/security/more-worries-over-the-security-of-web-assembly
• [3] https://www.zdnet.com/article/half-of-the-websites-using-webassembly-use-it-for-malicious-purposes

More discussions might be found on sites discussing Tor